Estus Flask

Estus Flask enters with X charge counters on it.
Remove a charge counter from Estus Flask: You
gain 5 life. Return target creature from your
graveyard to top of your library. Activate
only once each turn.
At the beginning of your upkeep, if Estus Flask
has no charge counters on it, return it to its
owner's hand.
An Estus Flask, an Undead favourite.