Alyndra, Devout Bladesinger

When Alyndra, Devout Bladesinger enters the
battlefield, chose target creature.
Creatures you control get +X/+0, where X is the
chosen creature's power.
Whenever the chosen creature leaves the
battlefield, you lose life equal to twice it's power.
"Faelar wishes you dead. I am here to do his bidding.
Any last words?"