The Fall of Zagoth

I- Until end of turn, you may cast a creature
from your hand for it's mutate cost without
paying it's mutate cost.
II- Search your library for basic lands equal to
the half number of non-Human creatures you
control rounded down, put them onto the battlefield tapped.
III- Put three +1/+1 counters and a trample
counter on each mutated creature you control.