Sailor Pluto

You may pay {1}{w/b} whenever a creature you control dies. If you do, you return that creature to the battlefield tapped under your control.

{3}{w/b}: Exile target permanent. Its controller may return it to the battlefield but loses 4 life.

At the beginning of each opponent's upkeep, that player loses 2 life.

"I stand at the threshold of life and death, time and eternity."