Skeleton Feats
As in Life, So in Death Feat 1
Source Pathfinder Book of the Dead
Specific memories of your old life are hard to hold onto, but you know things without remembering why. You gain the Adopted Ancestry feat. You can choose any ancestry, but it is likely to be one that matches both your skeleton heritage and who you were in life. As long as your body is completely covered by armor or clothing, you do not have to attempt Deception checks against a creature's Perception DC to successfully Impersonate yourself as a member of that ancestry. This is a non-magical disguise that doesn't protect against divination. This disguise doesn't provide any benefit against a creature actively attempting a Perception check against you.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
SkeletonThis undead is made by animating a dead creature's skeleton with negative energy. An ability with this trait can be used or selected only by skeletons.
Collapse 
Feat 1
Source Pathfinder Book of the Dead
Frequency once per 10 minutes
Trigger An enemy's Strike against you is a critical hit.
You collapse into a pile of bones, mitigating the worst of the damage you would have taken, and the triggering attack deals only the amount it would deal on a hit (typically full damage instead of double damage). Any other effects caused by a critical hit still occur. While collapsed, you're Flat-Footed and can't act except to Stand, which re-forms you into a skeleton in a standing position.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
SkeletonThis undead is made by animating a dead creature's skeleton with negative energy. An ability with this trait can be used or selected only by skeletons.
Play Dead 
Feat 1
Source Pathfinder Book of the Dead
You lie Prone and pretend to be an ordinary skeleton. As long as you don't move or take any actions requiring anything other than your mind, you appear dead. To see through your ruse, another creature must succeed at a check against your Deception DC, either by Seeking or Recalling Knowledge (typically using Religion or an appropriate Lore skill). This ability doesn't work against creatures that already know you're an animate undead unless you have changed your appearance.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
SkeletonThis undead is made by animating a dead creature's skeleton with negative energy. An ability with this trait can be used or selected only by skeletons.
Undead Empathy Feat 1
Source Pathfinder Book of the Dead
Your relationship with undeath gives you a stronger bond with other undead. You can use Diplomacy to Make an Impression on mindless undead or make simple requests of them. As long as there aren't living creatures nearby, they usually let you speak. If the undead creature currently is in the thrall of a creature whose level is higher than yours, you typically need a critical success on your Diplomacy skill check.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
SkeletonThis undead is made by animating a dead creature's skeleton with negative energy. An ability with this trait can be used or selected only by skeletons.
Past Life Feat 5
Source Pathfinder Book of the Dead
Flashes of your life become clearer and more frequent, allowing you to apply skills you developed while alive. You become trained in a skill of your choice and gain the Additional Lore feat for a Lore subcategory tied to your life.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
SkeletonThis undead is made by animating a dead creature's skeleton with negative energy. An ability with this trait can be used or selected only by skeletons.
Well-Armed Feat 5
Source Pathfinder Book of the Dead
Your detachable limbs offer flexibility. You Interact to remove your arm and wield it in the other one, increasing your reach by 5 feet for any one-handed weapon held in that arm. If your next action is a Strike with that weapon, creatures that were outside your reach that you can now hit are Flat-Footed against your first attack. You don't have a free hand while holding the arm. You can Interact to reattach the arm while holding it.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
SkeletonThis undead is made by animating a dead creature's skeleton with negative energy. An ability with this trait can be used or selected only by skeletons.
Bone Missile Feat 9
Source Pathfinder Book of the Dead
You can remove your ribs to use them as arrows or bolts. When you draw a rib, you lose 2 HP, and the projectile deals 2 extra negative damage if you Strike with it before the end of your next turn. The HP loss and extra damage both increase to 3 at 12th level and 4 at 19th level. Your rib cage magically replenishes, and any rib you draw crumbles to dust after being used for a Strike or at the end of your next turn, whichever comes first.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
SkeletonThis undead is made by animating a dead creature's skeleton with negative energy. An ability with this trait can be used or selected only by skeletons.
Rejuvenation Token Feat 9
Source Pathfinder Book of the Dead
You tie yourself to the Material Plane by implanting a piece of your consciousness into a weapon, piece of armor, or other item that's precious to you. As long as this object is intact, even if your body is destroyed, you can be restored to the exact state you were in the last time you made daily preparations with this object in your possession. The soulbound object can be used as a special focus for Raise Dead, Resurrect, or similar magic. This warps the spell to bring you back in your skeletal undead state rather than bringing you back to life. Pharasma can't prevent you from returning when the spell is modified in this way.
When you return, you permanently lose a memory that was precious to you, in addition to any other side effects of the spell that brought you back. Your soulbound object becomes inert until you spend 1 week of downtime to anchor yourself to it again, further fragmenting your mind.
Traits
Something of uncommon rarity requires special training or comes from a particular culture or part of the world. Some character choices give access to uncommon options, and the GM can choose to allow access for anyone. Less is known about uncommon creatures than common creatures. They typically can't be summoned. The DC of Recall Knowledge checks related to these creature is increased by 2.
NecromancyEffects and magic items with this trait are associated with the necromancy school of magic, typically involving forces of life and death.
SkeletonThis undead is made by animating a dead creature's skeleton with negative energy. An ability with this trait can be used or selected only by skeletons.
Skeletal Resistance Feat 9
Source Pathfinder Book of the Dead
Your body becomes resistant, your hardened bones deflecting weapons and other forms of damage. You gain resistance 2 to cold, electricity, fire, piercing, and slashing damage. This resistance increases to 3 at 13th level and 4 at 17th level.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
SkeletonThis undead is made by animating a dead creature's skeleton with negative energy. An ability with this trait can be used or selected only by skeletons.
Skeletal Transformation Feat 13
Source Pathfinder Book of the Dead
You rearrange your bones into a bestial shape. Once per day, you can cast Animal Form as a divine innate spell. When you cast it, you choose the spell's level: 3rd, 4th, or 5th. Your battle form looks like a skeletal version of the animal. In this form, you retain the benefits of any skeleton feats that do not require the use of hands or the ability to communicate.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
SkeletonThis undead is made by animating a dead creature's skeleton with negative energy. An ability with this trait can be used or selected only by skeletons.
Skeleton Commander Feat 13
Prerequisites expert in Religion
You gain the ability to summon your own skeletal minions. You learn the Create Undead rituals to create three types of undead for which you meet the prerequisites. These undead must have the skeleton trait or be other skeletal undead the GM agrees to. You can't teach these rituals to anyone else, and you can't participate in either ritual while allowing someone else to serve as the primary caster unless they also know the ritual.
You gain a +2 circumstance bonus to Religion checks for create undead rituals. You can also perform the ritual without the aid of a secondary caster; in this case, you attempt the secondary check normally performed by that caster.
Traits
Something of uncommon rarity requires special training or comes from a particular culture or part of the world. Some character choices give access to uncommon options, and the GM can choose to allow access for anyone. Less is known about uncommon creatures than common creatures. They typically can't be summoned. The DC of Recall Knowledge checks related to these creature is increased by 2.
SkeletonThis undead is made by animating a dead creature's skeleton with negative energy. An ability with this trait can be used or selected only by skeletons.
Bone Swarm Feat 17
Source Pathfinder Book of the Dead
Frequency once per day
You scatter your body and transform into a whirling storm of bones for up to 1 minute or until you spend a single action to return to your normal shape. You become Huge, gain the swarm trait, and gain a fly Speed of 40 feet. As a swarm, you have the following characteristics.
- You are immune to the Grabbed, Prone, and Restrained conditions.
- You have weakness 5 to area and splash damage.
- You can occupy the same space as other creatures and must do so to use your damaging ability.
- As a 2-action activity, you can deal 10d6 bludgeoning damage to all creatures sharing your space (basic reflex save with a DC equal to your class DC or spell DC, whichever is higher).
- You can't speak, Cast Spells, use manipulate actions requiring your hands, Activate magic items, or make any Strikes with your normal body.
- You don't gain the swarm mind ability, so you are still affected normally by mental effects. You also retain the benefits of skeleton feats that don't require communication or the use of hands.
Effect: Bone Swarm
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
ConcentrateAn action with this trait requires a degree of mental concentration and discipline.
PolymorphThese effects transform the target into a new form. A target can't be under the effect of more than one polymorph effect at a time. If it comes under the effect of a second polymorph effect, the second polymorph effect attempts to counteract the first. If it succeeds, it takes effect, and if it fails, the spell has no effect on that target. Any Strikes specifically granted by a polymorph effect are magical. Unless otherwise stated, polymorph spells don't allow the target to take on the appearance of a specific individual creature, but rather just a generic creature of a general type or ancestry. If you take on a battle form with a polymorph spell, the special statistics can be adjusted only by circumstance bonuses, status bonuses, and penalties. Unless otherwise noted, the battle form prevents you from casting spells, speaking, and using most manipulate actions that require hands. (If there's doubt about whether you can use an action, the GM decides.) Your gear is absorbed into you; the constant abilities of your gear still function, but you can't activate any items.
SkeletonThis undead is made by animating a dead creature's skeleton with negative energy. An ability with this trait can be used or selected only by skeletons.
TransmutationEffects and magic items with this trait are associated with the transmutation school of magic, typically changing something's form.
Necromantic Heir Feat 17
Source Pathfinder Book of the Dead
Your affinity for negative energy spills outward and grants you a refilling well of necromantic essence. Once per hour, you can cast Harm as a 6th-level divine innate spell.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
SkeletonThis undead is made by animating a dead creature's skeleton with negative energy. An ability with this trait can be used or selected only by skeletons.