Confidence:StrongSolidPlausibleTentativeSpeculative

• Esper Sojourners

  WUB

  Artifact Creature — Vedalken WizardBUW

  One-directional refresh: one card can untap permanents the other wants to reuse. Not self-sustaining on its own — the untapper has to keep showing up.
• Chevill, Bane of Monsters

  BG

  Legendary Creature — Human RogueBG

  Nine-Ringed Bo produces damage that can kill creatures, enabling Chevill, Bane of Monsters's death-trigger or removal payoff.
• Minsc & Boo, Timeless Heroes

  2RG

  Legendary Planeswalker — MinscGR

  Nine-Ringed Bo produces damage that can kill creatures, enabling Minsc & Boo, Timeless Heroes's death-trigger or removal payoff.
• Bloodline Recollector // Ancestral Craving

  1BB

  Creature — Vampire Warlock // InstantB

  Nine-Ringed Bo produces damage that can kill creatures, enabling Bloodline Recollector's death-trigger or removal payoff.
• Banon, the Returners' Leader

  RW

  Legendary Creature — Human Cleric RebelRW

  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.
• The Meathook Massacre

  XBB

  Legendary EnchantmentB

  Nine-Ringed Bo produces damage that can kill creatures, enabling The Meathook Massacre's death-trigger or removal payoff.
• Mari, the Killing Quill

  1BB

  Legendary Creature — Vampire AssassinB

  Nine-Ringed Bo produces damage that can kill creatures, enabling Mari, the Killing Quill's death-trigger or removal payoff.
• Quest for the Gravelord

  B

  EnchantmentB

  Nine-Ringed Bo produces damage that can kill creatures, enabling Quest for the Gravelord's death-trigger or removal payoff.
• Gravecrawler

  B

  Creature — ZombieB

  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.
• Bequeathal

  G

  Enchantment — AuraG

  Nine-Ringed Bo produces damage that can kill creatures, enabling Bequeathal's death-trigger or removal payoff.
• Kraven the Hunter

  1BG

  Legendary Creature — Human Warrior VillainBG

  Nine-Ringed Bo produces damage that can kill creatures, enabling Kraven the Hunter's death-trigger or removal payoff.
• Undead Sprinter

  BR

  Creature — ZombieBR

  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.
• Toshiro Umezawa

  1BB

  Legendary Creature — Human SamuraiB

  Nine-Ringed Bo produces damage that can kill creatures, enabling Toshiro Umezawa's death-trigger or removal payoff.
• Malicious Affliction

  BB

  InstantB

  Nine-Ringed Bo produces damage that can kill creatures, enabling Malicious Affliction's death-trigger or removal payoff.
• Timeline Culler

  BB

  Creature — Drix WarlockB

  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.
• Enduring Renewal

  2WW

  EnchantmentW

  Nine-Ringed Bo produces damage that can kill creatures, enabling Enduring Renewal's death-trigger or removal payoff.
• Glissa, the Traitor

  BGG

  Legendary Creature — Phyrexian Zombie ElfBG

  Nine-Ringed Bo produces damage that can kill creatures, enabling Glissa, the Traitor's death-trigger or removal payoff.
• Liliana, Heretical Healer // Liliana, Defiant Necromancer

  1BB

  Legendary Creature — Human Cleric // Legendary Planeswalker — LilianaB

  Nine-Ringed Bo produces damage that can kill creatures, enabling Liliana, Heretical Healer's death-trigger or removal payoff.
• Skullclamp

  1

  Artifact — EquipmentC

  Nine-Ringed Bo produces damage that can kill creatures, enabling Skullclamp's death-trigger or removal payoff.
• Lagomos, Hand of Hatred

  1BR

  Legendary Creature — Human ShamanBR

  Nine-Ringed Bo produces damage that can kill creatures, enabling Lagomos, Hand of Hatred's death-trigger or removal payoff.
• Ob Nixilis, Unshackled

  4BB

  Legendary Creature — DemonB

  Nine-Ringed Bo produces damage that can kill creatures, enabling Ob Nixilis, Unshackled's death-trigger or removal payoff.
• Tevesh Szat, Doom of Fools

  4B

  Legendary Planeswalker — SzatB

  Nine-Ringed Bo produces damage that can kill creatures, enabling Tevesh Szat, Doom of Fools's death-trigger or removal payoff.
• Assault Intercessor

  1WB

  Creature — Astartes WarriorBW

  Nine-Ringed Bo produces damage that can kill creatures, enabling Assault Intercessor's death-trigger or removal payoff.
• Tenacious Underdog

  1B

  Creature — Human WarriorB

  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.
• Sifa Grent

  3BR

  Legendary Planeswalker — SifaBR

  Nine-Ringed Bo produces damage that can kill creatures, enabling Sifa Grent's death-trigger or removal payoff.