Grand Slime

Annihilator 2
When you cast this card you may sacrifice a
creature you control. Reduce this card's cost
by {1} for each Evolve Counter on that card.
{x}: Remove {x} Evolve Counters from this card,
divided by 2. For each Evolve Counter removed
this way, place a 1/1 Slime Token with an
Evolve Counter onto the battlefield.
Whenever a permanent is sacrificed place an
Evolve Counter on this card.