Azathoth, Gate And Key

Indestructible, Protection from Everything
This Spell can't be countered .
Azathoth enters tapped and doesn’t untap
during your untap step.
Azathoth enters with 20 Eon counters on it, at beginning of your unkeep remove 1 Eon
counter.
When the last Eon counter is removed from Azathoth The Game ends.