Rashek, The Lord Ruler

Vigilance, Indestructible
The first time each opponent lose life this turn,
create a 1/1 white human ska creature token with
"{t}: you gain one life then each opponent loses one life."
Whenever you would gain life, you may sacrifice a
creature. If you do, you may have an opponent lose
twice that much life instead. If the creature you
sacrificed was a skaa, you may gain that much life.