Mercy, Angelic Healer

Mercy, Angelic Healer has flying as long as you control another creature with flying.
Ultimate
Whenever this creature deals damage or prevents damage from being dealt, it gets an ultimate counter.
{e}{e}{e}{e}: Flip this card
{1}{w}: Prevent the next 3 damage that would be dealt to target creature.
{3}{w}{w}: Return target creature card from the graveyard to the battlefield tapped.