Vandala, Host of Havoc

Trample, evolve
Whenever you cast another creature with 4 power
or greater, you get an experience counter.
{b}{g}{u}: Create a X/X green Hydra creature token
or put X +1/+1 on target hydra you control, X is
the number of experience counters you have.
Whenever Vandala deals combat damage to a
player, proliferate.