Shield of the Savior

Equipped creature gets +0/+3 and has vigilance.
Sacrifice equipped creature: The next time target creature you don't control with converterd mana
cost 3 or less would die this turn, return that
creature to the battlefield under your control and attatch Shield of the Savior to it.
Equip—{3}{w}
"I only regret that I have but one life to give"