Confidence:StrongSolidPlausibleTentativeSpeculative

• Mikaeus, the Unhallowed✓

  3BBB

  Legendary Creature — Zombie ClericB

  Death replacement: a death-replacement grant on one card lets the other repeatedly die-and-return for combo (Mikaeus + Walking Ballista class).
• Ruinous Waterbending

  1BB

  Sorcery — LessonB

  Both cards trigger when a creature dies — they fire together.
• Chandra, Torch of Defiance

  2RR

  Legendary Planeswalker — ChandraR

  Chandra, Torch of Defiance produces damage that can kill creatures, enabling The Reaper, King No More's death-trigger or removal payoff.
• Scavenger Regent // Exude Toxin

  3BXBB

  Creature — Dragon // Sorcery — OmenB

  Scavenger Regent produces damage that can kill creatures, enabling The Reaper, King No More's death-trigger or removal payoff.
• Agrus Kos, Spirit of Justice

  2RW

  Legendary Creature — Spirit DetectiveRW

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• Baron Helmut Zemo

  BBB

  Legendary Creature — Human Noble VillainB

  Copy engine: one card makes a copy of a creature every turn, and the other's enter-the-battlefield effect rewards each copy. Real, repeatable value — the partner can't untap or re-enter the copier, so it never goes infinite.
• Chevill, Bane of Monsters

  BG

  Legendary Creature — Human RogueBG

  Both cards trigger when a creature dies — they fire together.
• Minsc & Boo, Timeless Heroes

  2RG

  Legendary Planeswalker — MinscGR

  Minsc & Boo, Timeless Heroes produces damage that can kill creatures, enabling The Reaper, King No More's death-trigger or removal payoff.
• Elesh Norn, Grand Cenobite

  5WW

  Legendary Creature — Phyrexian PraetorW

  Elesh Norn, Grand Cenobite produces damage that can kill creatures, enabling The Reaper, King No More's death-trigger or removal payoff.
• Nicol Bolas, the Ravager // Nicol Bolas, the Arisen

  1UBR

  Legendary Creature — Elder Dragon // Legendary Planeswalker — BolasBRU

  Nicol Bolas, the Ravager produces damage that can kill creatures, enabling The Reaper, King No More's death-trigger or removal payoff.
• Sarkhan's Unsealing

  3R

  EnchantmentR

  Sarkhan's Unsealing produces damage that can kill creatures, enabling The Reaper, King No More's death-trigger or removal payoff.
• Wrenn and Six

  RG

  Legendary Planeswalker — WrennGR

  Wrenn and Six produces damage that can kill creatures, enabling The Reaper, King No More's death-trigger or removal payoff.
• Chandra, Flameshaper

  5RR

  Legendary Planeswalker — ChandraR

  Copy engine: one card makes a copy of a creature every turn, and the other's enter-the-battlefield effect rewards each copy. Real, repeatable value — the partner can't untap or re-enter the copier, so it never goes infinite.
• Chandra's Defeat

  R

  InstantR

  Chandra's Defeat produces damage that can kill creatures, enabling The Reaper, King No More's death-trigger or removal payoff.
• Ugin, the Spirit Dragon

  8

  Legendary Planeswalker — UginC

  Ugin, the Spirit Dragon produces damage that can kill creatures, enabling The Reaper, King No More's death-trigger or removal payoff.
• Lavabrink Floodgates

  3R

  ArtifactR

  Lavabrink Floodgates produces damage that can kill creatures, enabling The Reaper, King No More's death-trigger or removal payoff.
• Form of the Dragon

  4RRR

  EnchantmentR

  Form of the Dragon produces damage that can kill creatures, enabling The Reaper, King No More's death-trigger or removal payoff.
• Chandra, Hope's Beacon

  4RR

  Legendary Planeswalker — ChandraR

  Chandra, Hope's Beacon produces damage that can kill creatures, enabling The Reaper, King No More's death-trigger or removal payoff.
• Hammerfist Giant

  4RR

  Creature — Giant WarriorR

  Hammerfist Giant produces damage that can kill creatures, enabling The Reaper, King No More's death-trigger or removal payoff.
• Dragonback Assault

  3GUR

  EnchantmentGRU

  Dragonback Assault produces damage that can kill creatures, enabling The Reaper, King No More's death-trigger or removal payoff.
• Hateful Eidolon

  B

  Enchantment Creature — SpiritB

  Both cards trigger when a creature dies — they fire together.
• Chandra, Pyromaster

  2RR

  Legendary Planeswalker — ChandraR

  Chandra, Pyromaster produces damage that can kill creatures, enabling The Reaper, King No More's death-trigger or removal payoff.
• The Meathook Massacre

  XBB

  Legendary EnchantmentB

  Both cards trigger when a creature dies — they fire together.
• Solitude

  3WW

  Creature — Elemental IncarnationW

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• Nahiri, Storm of Stone

  2R/WR/W

  Legendary Planeswalker — NahiriRW

  Nahiri, Storm of Stone produces damage that can kill creatures, enabling The Reaper, King No More's death-trigger or removal payoff.