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. Any player may activate this ability but only during any upkeep step.
Near Mint - $0.90
Near Mint Non-English - $0.90
Lightly Played - $0.80
Lightly Played Non-English - $0.80
Played - $0.60
Played Non-English - $0.60
Heavily Played - $0.50
Heavily Played Non-English - $0.50
Damaged - $0.50
Damaged Non-English - $0.50