Mikhail, Sanguine Father

Deathtouch, Flying, Lifelink
Whenever a legendary creature dies, you gain X
life where X is equal to its converted mana cost,
then each opponent loses twice X life.
I'm the first son of Mardock, I've been here since
creation itself. I don't expect to be sent to my father
by a mere boy.
— Mikhail to Larz