Lursore of the Golden Fang

Trample, lifelink
When Lursore of the Golden Fang enters the battlefield, choose a color. Creatures you control
have protection from the chosen color as long as
Lursore of the Golden Fang is on the battlefield.
When Lursore of the Golden Fang leaves the battlefield, destroy all creatures of the chosen
color. You lose life equal to the number of
creatures destroyed in this way.