Droplet of Doomsday

Droplet of Doomsday enters the battlefield with
seven doom counters on it.
Remove a doom counter from Droplet of
Doomsday: Target player may return a creature
card from their graveyard to their hand.
Remove a doom counter from Droplet of
Doomsday: Target player searches their library
for a creature card, reveals it, puts it into their
hand, then shuffles.