"Revised Edition", "draw step" (4)
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.
At the beginning of each player's draw step, if Howling Mine is untapped, that player draws an additional card.
If you would draw a card during your draw step, instead you may skip that draw. If you do, until your next turn, you can't be attacked except by creatures with flying and/or islandwalk.
Mana Vault doesn't untap during your untap step.
At the beginning of your upkeep, you may pay . If you do, untap Mana Vault.
At the beginning of your draw step, if Mana Vault is tapped, it deals 1 damage to you.
: Add .
Gatherer works better in the Companion app!
. If you do, untap Mana Vault.
: Add 
.