Megumin

Whenever you cast a non creature spell,
Megumin gets +1/+0 until end of turn.
{5}{r}{r}{t}: Discard your hand and deal X damage
to any target where X is the total mana value of
cards discarded this way.
"Wahahahahaha! My name is Megumin, the
number one mage of Axel! Come, you shall all
become my experience points today!"