At the beginning of your upkeep, put a doom counter on Armageddon Clock..At the beginning of your draw step, Armageddon Clock deals damage equal to the number of doom counters on it to each player..{4}: Remove a doom counter from Armageddon Clock. ...
Enchant artifact.Whenever enchanted artifact becomes tapped or a player activates an ability of enchanted artifact without {T} in its activation cost, Artifact Possession deals 2 damage to that artifact's controller.
Enchant creature.Enchanted creature can't be blocked by artifact creatures..Prevent all damage that would be dealt to enchanted creature by artifact sources..Enchanted creature can't be the target of abilities from artifact sources.