Pit of Snakes Feat 13
Source Pathfinder Lost Omens: Impossible Lands
Mundane serpents obey your summons. You call forth a writhing mass of snakes, raising your hands to cause the snakes to emerge from the ground in a 20-foot burst within 120 feet. The snakes appear on all squares of the ground in the area and remain for 1 minute. When you use Pit of Snakes, all creatures in the area must attempt a fortitude save against the higher of your class DC or spell DC. Any creature that fails is Grabbed by a snake and takes 3d6 bludgeoning damage. Whenever a creature ends its turn in the area, the snakes attempt to Grab that creature if they aren't already grabbing it. Any creature already grabbed instead takes 2d6 bludgeoning damage.
The snakes' Escape DC is equal to the higher of your class DC or spell DC. A creature can attack a snake in an attempt to release its grip. The snake's AC is equal to the higher of your class DC or spell DC, and it's destroyed if it takes 12 or more damage. Even if a specific snake is destroyed, additional snakes continue to cavort in the area until the duration ends. You can Dismiss the effect.
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.
ConjurationEffects and magic items with this trait are associated with the conjuration school of magic, typically involving summoning, creation, teleportation, or moving things from place to place.
ManipulateYou must physically manipulate an item or make gestures to use an action with this trait. Creatures without a suitable appendage can't perform actions with this trait. Manipulate actions often trigger reactions.
NagajiA traditionalist ancestry with reptilian features and serpentine heads.
OccultThis magic comes from the occult tradition, calling upon bizarre and ephemeral mysteries. Anything with this trait is magical.