Winged Victory Mercy

Flying, Persist
{t} Target creature gains a +1/+0 until end of turn.
{3}{t} Target creature gains a +3/+1 until end of turn.
{5}{t} Target creature gains a +5/+3 until end of turn
{10}{w} All creatures of your choice get a +7/+7 and lifelink until end of turn.
If Winged Victory Mercy is exiled, return it to your deck, shuffle your deck afterwards.