Cthulhu,World Ender

Flying, ward - discard half of library, trample, deathtouch, haste, vigilance, indestructible, protection from everything, annihilator 4

Cthulhu, World Ender cannot be countered.

If Cthulhu, World Ender were to die, put them back in the command zone with 3 submerge counters. (creature cannot be played for 3 turns, after the 3 turns you may play the card for no mana cost.)

All lovecraftian horrors get +20/+20 counters.