Koun-Ryu, the Luck Dragon

Flying, Lifelink
Whenever an opponent causes a nonland
permanent you control to be destroyed, flip a
coin. If it lands on heads, you gain life equal to its manacost. If it lands on tails, destroy target
nonland permanent that opponent controls.
If Koun-Ryu would be put into the graveyard
from the battlefield, return her to her owner's
hand.