Shaella, Slayer of the Grim

All permanents have protection from black.
Swamps lose all abilities and gain "{t}: Add {w} or {r}"
Whenever a black creature enters the battlefield,
if it has toughness less than Shaella's power,
destroy it.
"Never before had I seen something so vile, so evil.
At that moment, I knew I had to destroy it and all it
stood for"