Confidence:StrongSolidPlausibleTentativeSpeculative

• Ruinous Waterbending

  1BB

  Sorcery — LessonB

  Both cards trigger when a creature dies — they fire together.
• Chevill, Bane of Monsters

  BG

  Legendary Creature — Human RogueBG

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

  B

  Enchantment Creature — SpiritB

  Both cards trigger when a creature dies — they fire together.
• Quest for the Gravelord

  B

  EnchantmentB

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

  1B

  Creature — Zombie SoldierB

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

  B

  SorceryB

  Reanimate puts Overseer of the Damned onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Kraven the Hunter

  1BG

  Legendary Creature — Human Warrior VillainBG

  Both cards trigger when a creature dies — they fire together.
• Gisa, the Hellraiser

  3BB

  Legendary Creature — Human WarlockB

  Both cards produce the same kind of effect (shared token subtype).
• Grave Researcher // Reanimate

  2BB

  Creature — Troll Warlock // SorceryB

  Grave Researcher puts Overseer of the Damned onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Rinoa, Angel Wing

  2W

  Legendary Creature — Human Rebel WarlockW

  Recursion engine: one card can reanimate repeatedly (an activated ability, or a return that comes back once a turn), and the other is a creature worth bringing back again and again — or a creature you recast from your graveyard beside a sacrifice outlet that doesn't pay for the recast. Real, repeatable value — not an infinite loop on its own.
• Enduring Renewal

  2WW

  EnchantmentW

  Both cards trigger when a creature dies — they fire together.
• Out of the Tombs

  2B

  EnchantmentB

  Recursion engine: one card can reanimate repeatedly (an activated ability, or a return that comes back once a turn), and the other is a creature worth bringing back again and again — or a creature you recast from your graveyard beside a sacrifice outlet that doesn't pay for the recast. Real, repeatable value — not an infinite loop on its own.
• Athreos, God of Passage

  1WB

  Legendary Enchantment Creature — GodBW

  Both cards trigger when a creature dies — they fire together.
• Ob Nixilis, Unshackled

  4BB

  Legendary Creature — DemonB

  Both cards trigger when a creature dies — they fire together.
• Glissa, the Traitor

  BGG

  Legendary Creature — Phyrexian Zombie ElfBG

  Both cards trigger when a creature dies — they fire together.
• Dennick, Pious Apprentice // Dennick, Pious Apparition

  WU

  Legendary Creature — Human Soldier // Legendary Creature — Spirit SoldierUW

  Both cards trigger when a creature dies — they fire together.
• The Meathook Massacre

  XBB

  Legendary EnchantmentB

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

  1WB

  Creature — Astartes WarriorBW

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

  2B

  Creature — Human AssassinB

  Both cards trigger when a creature dies — they fire together.
• Seize the Soul

  2BB

  InstantB

  Both cards trigger when a creature dies — they fire together.
• Shelob, Child of Ungoliant

  4BG

  Legendary Creature — Spider DemonBG

  Both cards trigger when a creature dies — they fire together.
• Mirrorhall Mimic // Ghastly Mimicry

  3U

  Creature — Spirit // Enchantment — AuraU

  One-shot copy enabler: a card enters as a copy of another (Phantasmal Image, Body Double, Phyrexian Metamorph), firing the partner's substantive ETB once. Not a repeating chain — fires once on entry — but valuable when the partner's ETB is combo-grade (graveyard reanimator, mana doubler, etc.).
• Nurgle's Rot

  B

  Enchantment — AuraB

  Both cards trigger when a creature dies — they fire together.
• Hansk, Slayer Zealot

  2RG

  Legendary Creature — Human ArcherGR

  Both cards trigger when a creature dies — they fire together.
• Kalitas, Traitor of Ghet

  2BB

  Legendary Creature — Vampire WarriorB

  Both cards produce the same kind of effect (shared token subtype).