Millie, I.M.P Asassin

Whenever Millie, I.M.P Asassin or another creature you control dies, each opponent loses 1 life and you gain 1 life.

"Exactly! Humans are full of secret nasties. It's
why sooo many of them end up here. Guilty
and innocent aren't our business Moxx. Killin'
who we're paid to is. Our. Business!"