Devasi, Blaze Baron

First Strike, Deathtouch
Whenever a player would gain life, you may have
that player lose that much life instead. If you lose
life this way, return a permanent from your
graveyard to the battlefield with converted mana
cost equal to or lower the amount of life lost this
way.
If Devasi, Blaze Baron or another creature you
control deals damage to an opponent, you may exchange life total with that player.