Greetings!
Behemoths have the unstoppable defensive ability, but they have no mythic rank in their description and thus not appear to have any mythic power to expend on it. What am I missing?
Thanks!
It's not referencing the mythic ability.
It's referencing the ability listed in the creature sub type.
Unstoppable (Ex) If a behemoth starts its turn suffering from any or all of the following conditions, it recovers from them at the end of its turn: blind, confused, dazed, deafened, dazzled, exhausted, fatigued, nauseated, sickened, slowed, staggered, and stunned.
This appears to be a bad case of designing rules elements with the same name and no clear indication of where to find them, unfortunately.