Apollo, Bringer of Radiance

Lifelink, Flash
{1}{p/w}: Another target creature gains lifelink until
the end of turn.
If a source an opponent controls would deal
damage to you or a permanent you control,
prevent 1 of that damage.
At the beginning of your upkeep, if your life
total is less than or equal to 20, transform Apollo,
Bringer of Radiance.
Do not forget that you are mortal