Ayen, Blood Sage

Shadow (This creature can not be blocked by creatures without shadow.)
Haste, deathtouch, reach
Whenever a creature leaves the battlefield, you may pay {b} to gain life equal to that creature's power and/or pay {r} to gain life equal to that creatures power.
Reborn {1} (If this creature were to leave the battlefield, phase out, or countered, you may pay {1} to have it enter the battlefield, phase in, or counter target spell. Exile target permanent.)