Mobius, Cosmic Maw

Indestructible, Hexproof.
Mobius, Cosmic Maw starts with 20 demand
counters. Any player may pay one mana or
two life to remove one counter any amount
of times per turn. When Mobius, Cosmic Maw
has no demand counters, the player who controls
Mobius, Cosmic Maw takes 10 damage and
Mobius, Cosmic Maw removes itself from
the game.