Old One's Slumber

Indestructible
Old One's Slumber enters the battlefield with 5 slumber counters on it. At the start of your
upkeep, remove a slumber counter from it. If it
has no counters on it, exile all nonland
permanents and gain 1 life for each card exiled
this way.
{5}: Put a slumber counter on Old One's
Slumber. Any player may activate this ability as a sorcery.