You transform into a Medium insect battle form with new attacks and temporary Hit Points.
Concentrate
Manipulate
Polymorph
Rank
3
Traditions
Arcane, Primal
Traits
Concentrate, Manipulate, Polymorph
Cast
2 actions
Duration
1 minute
You transform into a Medium insect battle form with new attacks and temporary Hit Points.
Heightened
4th
Your battle form is Large, and your attacks have 10-foot reach. You instead gain 15 temporary HP, attack modifier +16, damage bonus +6, and Athletics +16.
5th
Your battle form is Huge, and your attacks have 15-foot reach. You instead gain 20 temporary HP, attack modifier +18, damage bonus +2 and double damage dice (including persistent damage), and Athletics +20.
Source: Pathfinder Player Core, p. 338
Bring Insect Form into a Pathfinder 2e game with The DM Screen.