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.