King Bob-Omb, The Big Blast

Can't attack. block, or be destroyed by spells or abilities that say "destroy."
Blast counters cannot be removed or put on King Bob-Omb by other spells or abilities.
Whenever a creature enters the battlefield under an opponent's control, put a Blast counter on King Bob-Omb, then if it has ten counters on it, sacrifice it, it deals 10 damage to each creature and each opponent.