Q. 247 - Can i use Nature Warrior Prestige Class to progress Master of Many Forms Wild Shape Ability?
wilding(Su): nature's warrior levels stack with druid levels (as well as levels in other prestige classes that allow these abilities to stack) to determine wild shape abilities and wild empathy checks." ... "for purposes of wild shape size, type, and frequency"
It wouldn't be much of advantage, since you would still need 7th level at the prc for the Extraordinary, but you could get some extras and nifty abilities... something like...
Druid 10 / Master of Many Forms 7 / Nature Warrior 3
6th level spells, Wildshape up to Dragons and Gargantuan creatures... I'm sure this could be optimized...