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 - $7.90
Near Mint Non-English - $7.90
Lightly Played - $7.10
Lightly Played Non-English - $7.10
Played - $5.50
Played Non-English - $5.50
Heavily Played - $4.70
Heavily Played Non-English - $4.70
Damaged - $4.00
Damaged Non-English - $4.00