Mesa, Lethal Enforcer

Energize 1 —When Mesa, Lethal Enforcer enters
the battlefield, you get {e}.
Pay {e}: Mesa, Lethal Enforcer deals 1 damage
to each creature target opponent controls. If a
creature dealt damage this way would die this
turn, repeat this process.
Pay {e}{e}{e}: Mesa, Lethal Enforcer gains
indestructible until end of turn.