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 - $1.10
Near Mint Non-English - $1.10
Lightly Played - $1.00
Lightly Played Non-English - $1.00
Played - $0.80
Played Non-English - $0.80
Heavily Played - $0.70
Heavily Played Non-English - $0.70
Damaged - $0.60
Damaged Non-English - $0.60