Mirta, False Necromancer

Whenever a nontoken creature dies, you may pay {u}, if you do, create a 2/3 black elemental creature token.
Whenever a black spell is casted, elementals you control gain +1/+0 until end of turn.
{w}{u}, Sacrifice an elemental: Prevent the next 3
points of damage that would be dealt to any target and/or counter target spell.