Shandra, Woman of Glass

As long as you control another Illusion, Shandra
isn't a creature.
Whenever you cast an instant or sorcery spell, you
may pay {2}. If you do, create a 1/1 blue Illusion creature token.
{3}, sacrifice two Illusions: Counter target spell
with converted mana cost three or less.
Only fools are burned twice by the same fire.