Confidence:StrongSolidPlausibleTentativeSpeculative

• Goblin Engineer

  1R

  Creature — Goblin ArtificerR

  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.
• Auriok Salvagers

  3W

  Creature — Human SoldierW

  Sacrifice-recursion engine: one card repeatedly returns the other from the graveyard, and the returned card sacrifices itself again for value — the Auriok Salvagers + Black Lotus shape.
• Argivian Archaeologist

  1WW

  Creature — Human ArtificerW

  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.
• Trading Post

  4

  ArtifactC

  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.
• Shuri's Fabricator

  4

  ArtifactC

  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.
• Instrument of the Bards

  G

  Legendary ArtifactG

  Mana loop: net-positive mana cycle between the two cards.
• Reckless Lackey

  R

  Creature — Goblin PirateR

  Mana loop: net-positive mana cycle between the two cards.
• Mr. House, President and CEO

  RWB

  Legendary Artifact Creature — HumanBRW

  Mana loop: net-positive mana cycle between the two cards.
• Currency Converter

  1

  ArtifactC

  Mana loop: net-positive mana cycle between the two cards.
• Stark Industries Executive

  R

  Creature — Human AdvisorR

  Mana loop: net-positive mana cycle between the two cards.
• Forsworn Paladin

  B

  Creature — Human KnightB

  Mana loop: net-positive mana cycle between the two cards.
• Fain, the Broker

  2B

  Legendary Creature — Human WarlockB

  Mana loop: net-positive mana cycle between the two cards.
• Ashnod, Flesh Mechanist

  B

  Legendary Creature — Human ArtificerB

  Mana loop: net-positive mana cycle between the two cards.
• Wizard's Rockets

  1

  ArtifactC

  Mana loop: net-positive mana cycle between the two cards.
• Gleaming Splendor

  1W

  EnchantmentW

  Mana loop: net-positive mana cycle between the two cards.
• Petalmane Baku

  1G

  Creature — SpiritG

  Mana loop: net-positive mana cycle between the two cards.
• Contested Game Ball

  2

  ArtifactC

  Mana loop: net-positive mana cycle between the two cards.
• Discerning Financier

  2W

  Creature — Human NobleW

  Mana loop: net-positive mana cycle between the two cards.
• Thran Spider

  3

  Artifact Creature — SpiderC

  Mana loop: net-positive mana cycle between the two cards.
• Tavern Scoundrel

  1R

  Creature — Human RogueR

  Mana loop: net-positive mana cycle between the two cards.
• Redshift, Rocketeer Chief

  RG

  Legendary Creature — Goblin PilotGR

  Mana loop: net-positive mana cycle between the two cards.
• Treasure Dredger

  1B

  Creature — Human RogueB

  Mana loop: net-positive mana cycle between the two cards.
• Impulsive Pilferer

  R

  Creature — Goblin PirateR

  Mana loop: net-positive mana cycle between the two cards.
• Geology Enthusiast

  3UU

  Creature — Human ArtificerU

  Mana loop: net-positive mana cycle between the two cards.
• Fire Lord Ozai

  3B

  Legendary Creature — Human NobleBR

  Mana loop: net-positive mana cycle between the two cards.