Confidence:StrongSolidPlausibleTentativeSpeculative

• Mirror Room // Fractured Realm

  2U5UU

  Enchantment — Room // Enchantment — RoomU

  Mirror Room makes Armageddon Clock's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Echoes of Eternity

  3CCC

  Kindred Enchantment — EldraziC

  Echoes of Eternity makes Armageddon Clock's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Fiery Gambit

  2R

  SorceryR

  Fiery Gambit untaps lands, fueling Armageddon Clock's mana-hungry effect.
• Innocuous Researcher

  3G

  Creature — Centaur DetectiveG

  Innocuous Researcher untaps lands, fueling Armageddon Clock's mana-hungry effect.
• Time Spiral

  4UU

  SorceryU

  Time Spiral untaps lands, fueling Armageddon Clock's mana-hungry effect.
• City on Fire

  5RRR

  EnchantmentR

  Armageddon Clock deals damage, and City on Fire makes each hit bigger — it doubles, triples or adds to the damage your sources deal.
• Fiery Emancipation

  3RRR

  EnchantmentR

  Armageddon Clock deals damage, and Fiery Emancipation makes each hit bigger — it doubles, triples or adds to the damage your sources deal.
• Nissa, Vastwood Seer // Nissa, Sage Animist

  2G

  Legendary Creature — Elf Scout // Legendary Planeswalker — NissaG

  Nissa, Vastwood Seer untaps lands, fueling Armageddon Clock's mana-hungry effect.
• Sawhorn Nemesis

  3R

  Creature — DinosaurR

  Armageddon Clock deals damage, and Sawhorn Nemesis makes each hit bigger — it doubles, triples or adds to the damage your sources deal.
• Rem Karolus, Stalwart Slayer

  1RW

  Legendary Creature — Human KnightRW

  Armageddon Clock deals damage, and Rem Karolus, Stalwart Slayer makes each hit bigger — it doubles, triples or adds to the damage your sources deal.
• Twinflame Tyrant

  3RR

  Creature — DragonR

  Armageddon Clock deals damage, and Twinflame Tyrant makes each hit bigger — it doubles, triples or adds to the damage your sources deal.
• Tor Wauki the Younger

  3BR

  Legendary Creature — Human ArcherBR

  Armageddon Clock deals damage, and Tor Wauki the Younger makes each hit bigger — it doubles, triples or adds to the damage your sources deal.
• Rewind

  2UU

  InstantU

  Rewind untaps lands, fueling Armageddon Clock's mana-hungry effect.
• Finale of Revelation

  XUU

  SorceryU

  Finale of Revelation untaps lands, fueling Armageddon Clock's mana-hungry effect.
• Gisela, Blade of Goldnight

  4RWW

  Legendary Creature — AngelRW

  Armageddon Clock deals damage, and Gisela, Blade of Goldnight makes each hit bigger — it doubles, triples or adds to the damage your sources deal.
• Spiked Corridor // Torture Pit

  3R3R

  Enchantment — Room // Enchantment — RoomR

  Armageddon Clock deals damage, and Spiked Corridor makes each hit bigger — it doubles, triples or adds to the damage your sources deal.
• Thor, Asgard's Avenger

  2RR

  Legendary Creature — God Warrior HeroR

  Armageddon Clock deals damage, and Thor, Asgard's Avenger makes each hit bigger — it doubles, triples or adds to the damage your sources deal.
• Prophet of Kruphix

  3GU

  Creature — Human WizardGU

  Prophet of Kruphix untaps lands, fueling Armageddon Clock's mana-hungry effect.
• Lightning, Army of One

  1RW

  Legendary Creature — Human SoldierRW

  Armageddon Clock deals damage, and Lightning, Army of One makes each hit bigger — it doubles, triples or adds to the damage your sources deal.
• Solphim, Mayhem Dominus

  2RR

  Legendary Creature — Phyrexian HorrorR

  Armageddon Clock deals damage, and Solphim, Mayhem Dominus makes each hit bigger — it doubles, triples or adds to the damage your sources deal.
• Isengard Unleashed

  2RRR

  SorceryR

  Armageddon Clock deals damage, and Isengard Unleashed makes each hit bigger — it doubles, triples or adds to the damage your sources deal.
• Bumi, Unleashed

  3RG

  Legendary Creature — Human Noble AllyGR

  Bumi, Unleashed untaps lands, fueling Armageddon Clock's mana-hungry effect.
• Insult // Injury

  2R2R

  Sorcery // SorceryR

  Armageddon Clock deals damage, and Insult makes each hit bigger — it doubles, triples or adds to the damage your sources deal.
• Angrath's Marauders

  5RR

  Creature — Human PirateR

  Armageddon Clock deals damage, and Angrath's Marauders makes each hit bigger — it doubles, triples or adds to the damage your sources deal.
• Sphinx of the Second Sun

  6UU

  Creature — SphinxU

  Sphinx of the Second Sun untaps lands, fueling Armageddon Clock's mana-hungry effect.