Nidoking

Mutate {3}{r/g}{r/g}, Trample
{1}{t}: Untap Nidoking after damage step.
When this creature attacks put a +1/+1 counter on it for each time its mutated.
Then put an Indestructible counter on
it.
At the beginning of your end step, if
this creature didn't attack this turn,
remove all counters from it.