Guardian Angels

Flying, vigilance

Other creatures you control have Guidance 2. (Guidance — Whenever this creature attacks or blocks, scry 2.)
At the beginning of each end step, if a source an opponent controls dealt damage to a permanent you control this turn, you gain 1 life for each of those permanents.
When Guardian Angels leaves the battlefield, destroy any nonangel or nonhuman creature on the battlefield.

"We shield the innocent until our last breath,
so, their hope and salvation might prevail."