Confidence:StrongSolidPlausibleTentativeSpeculative

• Goblin Welder✓

  R

  Creature — Goblin ArtificerR

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Lonis, Cryptozoologist

  GU

  Legendary Creature — Snake Elf ScoutGU

  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.
• Dr. Madison Li

  URW

  Legendary Creature — Human ScientistRUW

  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.
• Queen Kayla bin-Kroog

  1RW

  Legendary Creature — Human NobleRW

  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.
• Jhoira, Ageless Innovator

  UR

  Legendary Creature — Human ArtificerRU

  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.
• Scrap Welder

  2R

  Creature — Goblin ArtificerR

  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.
• Rat King, Verminister

  1B

  Legendary Creature — Rat AvatarB

  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.
• Master Transmuter✓

  3U

  Artifact Creature — Human ArtificerU

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

  1R

  Creature — Goblin ArtificerR

  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.
• The Mind Stone

  1W

  Legendary Artifact — Infinity StoneW

  Blink pair: one card can blink creatures repeatedly, and the other's ETB rewards every re-entry. Free-running only when the blink is free or refunded (Deadeye + Drake class); otherwise a repeatable value engine.
• Redshift, Rocketeer Chief

  RG

  Legendary Creature — Goblin PilotGR

  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.
• Teleportation Circle

  3W

  EnchantmentW

  Blink pair: one card can blink creatures repeatedly, and the other's ETB rewards every re-entry. Free-running only when the blink is free or refunded (Deadeye + Drake class); otherwise a repeatable value engine.
• Displacer Kitten

  3U

  Creature — Cat BeastU

  Blink pair: one card can blink creatures repeatedly, and the other's ETB rewards every re-entry. Free-running only when the blink is free or refunded (Deadeye + Drake class); otherwise a repeatable value engine.
• Livio, Oathsworn Sentinel

  1W

  Legendary Creature — Human KnightW

  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.
• Brago, King Eternal

  2WU

  Legendary Creature — Spirit NobleUW

  Blink pair: one card can blink creatures repeatedly, and the other's ETB rewards every re-entry. Free-running only when the blink is free or refunded (Deadeye + Drake class); otherwise a repeatable value engine.
• Gilraen, Dúnedain Protector

  2W

  Legendary Creature — Human NobleW

  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.
• Tocasia, Dig Site Mentor

  1GWU

  Legendary Creature — Human ArtificerGUW

  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.
• Ramosian Revivalist

  3W

  Creature — Human Rebel ClericW

  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.
• Patron of the Orochi

  6GG

  Legendary Creature — SpiritG

  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.
• Zoologist

  3G

  Creature — Human DruidG

  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.
• Brought Back

  WW

  InstantW

  Brought Back returns creatures from the graveyard to the battlefield, re-firing Sewer-veillance Cam's enter-the-battlefield effect.
• Jolted Awake

  W

  SorceryW

  Jolted Awake returns creatures from the graveyard to the battlefield, re-firing Sewer-veillance Cam's enter-the-battlefield effect.
• Tameshi, Reality Architect

  2U

  Legendary Creature — Moonfolk WizardUW

  Tameshi, Reality Architect returns creatures from the graveyard to the battlefield, re-firing Sewer-veillance Cam's enter-the-battlefield effect.
• Phelia, Exuberant Shepherd

  1W

  Legendary Creature — DogW

  Phelia, Exuberant Shepherd blinks (exiles and returns) a permanent, re-firing Sewer-veillance Cam's enter-the-battlefield effect.
• Elrond, Moon-Reader

  2U

  Legendary Creature — Elf NobleU

  Elrond, Moon-Reader blinks (exiles and returns) a permanent, re-firing Sewer-veillance Cam's enter-the-battlefield effect.