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.
: Remove a doom counter from Armageddon Clock. Any player may activate this ability but only during any upkeep step.
Put one counter on Armageddon Clock during each of your upkeeps. At the end of your upkeep, each player takes damage equal to the number of counters on the Clock. Any player may spend during any upkeep to remove a counter.
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