Confidence:StrongSolidPlausibleTentativeSpeculative

• Goblin Sharpshooter

  2R

  Creature — GoblinR

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Slumbering Cerberus

  1R

  Creature — DogR

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Faces of the Past

  2U

  EnchantmentU

  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.
• Galvanic Juggernaut

  4

  Artifact Creature — JuggernautC

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Tolarian Kraken

  4UU

  Creature — KrakenU

  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.
• Sabertooth Mauler

  3G

  Creature — CatG

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Chevill, Bane of Monsters

  BG

  Legendary Creature — Human RogueBG

  Krovikan Plague 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

  Krovikan Plague produces damage that can kill creatures, enabling Minsc & Boo, Timeless Heroes'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

  Krovikan Plague 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

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

  B

  EnchantmentB

  Krovikan Plague 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

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

  1BG

  Legendary Creature — Human Warrior VillainBG

  Krovikan Plague 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.
• Lita, Mechanical Engineer

  2W

  Legendary Artifact Creature — ArtificerW

  Lita, Mechanical Engineer untaps all (or many) permanents, refreshing Krovikan Plague's tap activation.
• Toshiro Umezawa

  1BB

  Legendary Creature — Human SamuraiB

  Krovikan Plague produces damage that can kill creatures, enabling Toshiro Umezawa's death-trigger or removal payoff.
• Copperhorn Scout

  G

  Creature — Elf ScoutG

  Copperhorn Scout untaps all (or many) permanents, refreshing Krovikan Plague's tap activation.
• Malicious Affliction

  BB

  InstantB

  Krovikan Plague 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

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

  BGG

  Legendary Creature — Phyrexian Zombie ElfBG

  Krovikan Plague produces damage that can kill creatures, enabling Glissa, the Traitor's death-trigger or removal payoff.
• White Plume Adventurer

  2W

  Creature — Orc ClericW

  White Plume Adventurer untaps all (or many) permanents, refreshing Krovikan Plague's tap activation.
• Liliana, Heretical Healer // Liliana, Defiant Necromancer

  1BB

  Legendary Creature — Human Cleric // Legendary Planeswalker — LilianaB

  Krovikan Plague produces damage that can kill creatures, enabling Liliana, Heretical Healer's death-trigger or removal payoff.