Ancestral Unarmed Attack
Feat 1
At 5th level, whenever you land a critical hit with one of these attacks, you can add its critical specialization effect.
Option(s): proboscis, 1d6 piercing [finesse, grapple, unarmed], knife weapon group; or projectile vomit, 1d4 acid [range increment 30 feet, unarmed], acid weapon group