Combos Utilizing Armageddon-Clock

just use the pentagram to prevent the damage

deal it, but dont take it!

have both in play. spend 1 mana & use karn's ability to turn armageddon clock into a 6/6 creature until end of turn

The Armageddon Clock deals damage to your opponents while you use the Mox Diamond to activate the COP: Artifacts to prevent you from taking damage Manabarbs make the others take 4 damage every turn.

damage from armageddon clock is redirected to the 1/6 creature

Play Armageddon Clock then play congregate (gaining mad life) after that play armageddon, therefore no one can counter armageddon clock and you have the most life.

Enchant Armageddon clock with Animate Artifact. Armageddon Clock becomes an 6/6 creature

cast wrath to destroy all creatures. cast karn's touch to turn armageddon clock into a 6/6 creature and attack. you opponent has no creatures to block it with