Confidence:StrongSolidPlausibleTentativeSpeculative

• Goldhound

  R

  Artifact Creature — Treasure DogR

  Sacrifice-recursion with a catch: one card can return the other from the graveyard, but the return ability has an extra cost (sacrificing another creature, discarding a card, or tapping with no way to untap) the pair can't pay by itself. It works once — something else must keep supplying the fodder to make it repeatable.
• Diamond Lion

  2

  Artifact Creature — CatC

  Sacrifice-recursion with a catch: one card can return the other from the graveyard, but the return ability has an extra cost (sacrificing another creature, discarding a card, or tapping with no way to untap) the pair can't pay by itself. It works once — something else must keep supplying the fodder to make it repeatable.
• Composite Golem

  6

  Artifact Creature — GolemBGRUW

  Sacrifice-recursion with a catch: one card can return the other from the graveyard, but the return ability has an extra cost (sacrificing another creature, discarding a card, or tapping with no way to untap) the pair can't pay by itself. It works once — something else must keep supplying the fodder to make it repeatable.
• Llanowar Druid

  1G

  Creature — Elf DruidG

  Refuel loop: one card's payoff untaps your lands, paying for the other's activation again — repeatable every turn, and often infinite.
• 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.
• Crosis's Attendant

  5

  Artifact Creature — GolemBRU

  Sacrifice-recursion with a catch: one card can return the other from the graveyard, but the return ability has an extra cost (sacrificing another creature, discarding a card, or tapping with no way to untap) the pair can't pay by itself. It works once — something else must keep supplying the fodder to make it repeatable.
• Darigaaz's Attendant

  5

  Artifact Creature — GolemBGR

  Sacrifice-recursion with a catch: one card can return the other from the graveyard, but the return ability has an extra cost (sacrificing another creature, discarding a card, or tapping with no way to untap) the pair can't pay by itself. It works once — something else must keep supplying the fodder to make it repeatable.
• Dromar's Attendant

  5

  Artifact Creature — GolemBUW

  Sacrifice-recursion with a catch: one card can return the other from the graveyard, but the return ability has an extra cost (sacrificing another creature, discarding a card, or tapping with no way to untap) the pair can't pay by itself. It works once — something else must keep supplying the fodder to make it repeatable.
• Rith's Attendant

  5

  Artifact Creature — GolemGRW

  Sacrifice-recursion with a catch: one card can return the other from the graveyard, but the return ability has an extra cost (sacrificing another creature, discarding a card, or tapping with no way to untap) the pair can't pay by itself. It works once — something else must keep supplying the fodder to make it repeatable.
• Treva's Attendant

  5

  Artifact Creature — GolemGUW

  Sacrifice-recursion with a catch: one card can return the other from the graveyard, but the return ability has an extra cost (sacrificing another creature, discarding a card, or tapping with no way to untap) the pair can't pay by itself. It works once — something else must keep supplying the fodder to make it repeatable.
• Thornbite Staff

  2

  Kindred Artifact — Shaman EquipmentC

  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.
• Coal Golem

  5

  Artifact Creature — GolemR

  Sacrifice-recursion with a catch: one card can return the other from the graveyard, but the return ability has an extra cost (sacrificing another creature, discarding a card, or tapping with no way to untap) the pair can't pay by itself. It works once — something else must keep supplying the fodder to make it repeatable.
• Tinybones Joins Up

  B

  Legendary EnchantmentB

  Recursion engine: one card can reanimate repeatedly (an activated ability), and the other is a creature worth bringing back again and again. Real, repeatable value — not an infinite loop on its own.
• Spreading Plague

  4B

  EnchantmentB

  Recursion engine: one card can reanimate repeatedly (an activated ability), and the other is a creature worth bringing back again and again. Real, repeatable value — not an infinite loop on its own.
• Phyrexian Dreadnought

  1

  Artifact Creature — Phyrexian DreadnoughtC

  Recursion engine: one card can reanimate repeatedly (an activated ability), and the other is a creature worth bringing back again and again. Real, repeatable value — not an infinite loop on its own.
• Lita, Mechanical Engineer

  2W

  Legendary Artifact Creature — ArtificerW

  Lita, Mechanical Engineer untaps all (or many) permanents, refreshing Scarecrone's tap activation.
• Copperhorn Scout

  G

  Creature — Elf ScoutG

  Copperhorn Scout untaps all (or many) permanents, refreshing Scarecrone's tap activation.
• White Plume Adventurer

  2W

  Creature — Orc ClericW

  White Plume Adventurer untaps all (or many) permanents, refreshing Scarecrone's tap activation.
• Jace, Ingenious Mind-Mage

  4UU

  Legendary Planeswalker — JaceU

  Jace, Ingenious Mind-Mage untaps all (or many) permanents, refreshing Scarecrone's tap activation.
• Sarinth Steelseeker

  1G

  Creature — Human Artificer ScoutG

  Recursion engine: one card can reanimate repeatedly (an activated ability), and the other is a creature worth bringing back again and again. Real, repeatable value — not an infinite loop on its own.
• Aggravated Assault

  2R

  EnchantmentR

  Aggravated Assault untaps all (or many) permanents, refreshing Scarecrone's tap activation.
• Death Match

  3B

  EnchantmentB

  Recursion engine: one card can reanimate repeatedly (an activated ability), and the other is a creature worth bringing back again and again. Real, repeatable value — not an infinite loop on its own.
• The Thirteenth Doctor

  1GU

  Legendary Creature — Time Lord DoctorGU

  The Thirteenth Doctor untaps all (or many) permanents, refreshing Scarecrone's tap activation.
• Veteran Beastrider

  1GW

  Creature — Human KnightGW

  Veteran Beastrider untaps all (or many) permanents, refreshing Scarecrone's tap activation.
• Intruder Alarm

  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.