Confidence:StrongSolidPlausibleTentativeSpeculative

• Kiki-Jiki, Mirror Breaker✓

  2RRR

  Legendary Creature — Goblin ShamanR

  Copy chain: one card creates hasty copies of a creature whose ability or ETB the partner exploits — the canonical Kiki-Jiki / Splinter Twin pattern.
• The Jolly Balloon Man✓

  1RW

  Legendary Creature — Human ClownRW

  Paid copy loop: one card makes copies of a creature, and each copy readies the copier to copy again — but a copy or the untap costs mana every time. It runs for as long as you can pay: a mana sink, infinite only with infinite mana.
• Splinter Twin✓

  2RR

  Enchantment — AuraR

  Copy chain: one card creates hasty copies of a creature whose ability or ETB the partner exploits — the canonical Kiki-Jiki / Splinter Twin pattern.
• Tamiyo, Compleated Sage

  2GG/U/PU

  Legendary Planeswalker — TamiyoGU

  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.
• Saheeli, the Sun's Brilliance

  UR

  Legendary Creature — Human ArtificerRU

  Paid copy loop: one card makes copies of a creature, and each copy readies the copier to copy again — but a copy or the untap costs mana every time. It runs for as long as you can pay: a mana sink, infinite only with infinite mana.
• Arcane Artisan

  2U

  Creature — Human WizardU

  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.
• Tawnos, Solemn Survivor

  1U

  Legendary Creature — Human ArtificerBUW

  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.
• Tempestra, Dame of Games

  1R

  Legendary Creature — Elemental IllusionR

  Copy engine: one card makes copies of a creature — once a turn, or once for each time you pay its cost — and each copy pays off: the creature's enter-the-battlefield effect fires again, or the hasty copy uses its tap ability. Real, repeatable value — every copy has its turn or its price, so it never goes infinite on its own.
• Feldon of the Third Path

  1RR

  Legendary Creature — Human ArtificerR

  Paid copy loop: one card makes copies of a creature, and each copy readies the copier to copy again — but a copy or the untap costs mana every time. It runs for as long as you can pay: a mana sink, infinite only with infinite mana.
• Orthion, Hero of Lavabrink

  3R

  Legendary Creature — Human SoldierR

  Paid copy loop: one card makes copies of a creature, and each copy readies the copier to copy again — but a copy or the untap costs mana every time. It runs for as long as you can pay: a mana sink, infinite only with infinite mana.
• Jaxis, the Troublemaker

  3R

  Legendary Creature — Human WarriorR

  Copy engine: one card makes copies of a creature — once a turn, or once for each time you pay its cost — and each copy pays off: the creature's enter-the-battlefield effect fires again, or the hasty copy uses its tap ability. Real, repeatable value — every copy has its turn or its price, so it never goes infinite on its own.
• Minsc & Boo, Timeless Heroes

  2RG

  Legendary Planeswalker — MinscGR

  Coercive Recruiter temporarily takes control of an opponent's creature, and Minsc & Boo, Timeless Heroes sacrifices it — the opponent loses the permanent for good.
• Season of Growth

  1G

  EnchantmentG

  Both cards trigger when a creature enters the battlefield — they fire together.
• Mask of the Mimic

  U

  InstantU

  Coercive Recruiter temporarily takes control of an opponent's creature, and Mask of the Mimic sacrifices it — the opponent loses the permanent for good.
• Spreading Plague

  4B

  EnchantmentB

  Both cards trigger when a creature enters the battlefield — they fire together.
• Tinybones Joins Up

  B

  Legendary EnchantmentB

  Both cards trigger when a creature enters the battlefield — they fire together.
• Faramir, Steward of Gondor

  1WU

  Legendary Creature — Human NobleUW

  Both cards trigger when a creature enters the battlefield — they fire together.
• My Precious // Allure of Power

  31B

  Legendary Artifact — Equipment // Instant — AdventureB

  Coercive Recruiter temporarily takes control of an opponent's creature, and My Precious sacrifices it — the opponent loses the permanent for good.
• Eye of Singularity

  3W

  World EnchantmentW

  Both cards trigger when a creature enters the battlefield — they fire together.
• Kethek, Crucible Goliath

  2BR

  Legendary Creature — Phyrexian BeastBR

  Coercive Recruiter temporarily takes control of an opponent's creature, and Kethek, Crucible Goliath sacrifices it — the opponent loses the permanent for good.
• Garruk, Curse Breaker

  3GG

  Legendary Planeswalker — GarrukG

  Both cards trigger when a creature enters the battlefield — they fire together.
• Kadena, Slinking Sorcerer

  1BGU

  Legendary Creature — Snake Wizard SorcererBGU

  Both cards trigger when a creature enters the battlefield — they fire together.
• Grist, Voracious Larva // Grist, the Plague Swarm

  G

  Legendary Creature — Insect // Legendary Planeswalker — GristBG

  Both cards trigger when a creature enters the battlefield — they fire together.
• Grimgrin, Corpse-Born

  3UB

  Legendary Creature — Zombie WarriorBU

  Coercive Recruiter temporarily takes control of an opponent's creature, and Grimgrin, Corpse-Born sacrifices it — the opponent loses the permanent for good.
• Warden of the Grove

  2G

  Creature — HydraG

  Both cards trigger when a creature enters the battlefield — they fire together.