Nidorina

Mutate 2{g},
Attacking creatures get -1/-0 for each time
this creatures mutated if you control a
creature with a converted mana cost of 1 or
less.
{c}: spend only mana produced by artifacts to
activate this ability. Cast Nidoqueen for its
mutate cost, targeting Nidorina, from your hand,
graveyard or library.