Confidence:StrongSolidPlausibleTentativeSpeculative

• Saheeli, the Sun's Brilliance

  UR

  Legendary Creature — Human ArtificerRU

  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

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

  1RR

  Legendary Creature — Human ArtificerR

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

  1R

  Legendary Creature — Elemental IllusionR

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

  3R

  Legendary Creature — Human SoldierR

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

  3R

  Legendary Creature — Human WarriorR

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

  BBB

  Legendary Creature — Human Noble VillainB

  Copy engine: one card makes a copy of a creature every turn, and the other's enter-the-battlefield effect rewards each copy. Real, repeatable value — the partner can't untap or re-enter the copier, so it never goes infinite.
• Zul Ashur, Lich Lord

  1B

  Legendary Creature — Zombie WarlockB

  White Plume Adventurer untaps all (or many) permanents, refreshing Zul Ashur, Lich Lord's tap activation.
• Jenson Carthalion, Druid Exile

  GW

  Legendary Creature — Human DruidBGRUW

  White Plume Adventurer untaps all (or many) permanents, refreshing Jenson Carthalion, Druid Exile's tap activation.
• Hazel of the Rootbloom

  2BG

  Legendary Creature — Squirrel DruidBG

  White Plume Adventurer untaps all (or many) permanents, refreshing Hazel of the Rootbloom's tap activation.
• Honest Work

  U

  Enchantment — AuraU

  White Plume Adventurer untaps all (or many) permanents, refreshing Honest Work's tap activation.
• Cybernetica Datasmith

  1UB

  Artifact Creature — Human ArtificerBU

  White Plume Adventurer untaps all (or many) permanents, refreshing Cybernetica Datasmith's tap activation.
• Brigone, Soldier of Meletis

  1W

  Legendary Creature — Human SoldierW

  White Plume Adventurer untaps all (or many) permanents, refreshing Brigone, Soldier of Meletis's tap activation.
• Chandra, Flameshaper

  5RR

  Legendary Planeswalker — ChandraR

  Copy engine: one card makes a copy of a creature every turn, and the other's enter-the-battlefield effect rewards each copy. Real, repeatable value — the partner can't untap or re-enter the copier, so it never goes infinite.
• Skrelv, Defector Mite

  W

  Legendary Artifact Creature — Phyrexian MiteW

  White Plume Adventurer untaps all (or many) permanents, refreshing Skrelv, Defector Mite's tap activation.
• Yisan, the Wanderer Bard

  2G

  Legendary Creature — Human Rogue BardG

  White Plume Adventurer untaps all (or many) permanents, refreshing Yisan, the Wanderer Bard's tap activation.
• Fiend Artisan

  B/GB/G

  Creature — NightmareBG

  White Plume Adventurer untaps all (or many) permanents, refreshing Fiend Artisan's tap activation.
• Weaver of Harmony

  1G

  Enchantment Creature — Snake DruidG

  White Plume Adventurer untaps all (or many) permanents, refreshing Weaver of Harmony's tap activation.
• Radha, Heir to Keld

  RG

  Legendary Creature — Elf WarriorGR

  White Plume Adventurer untaps all (or many) permanents, refreshing Radha, Heir to Keld's tap activation.
• Basri, Tomorrow's Champion

  W

  Legendary Creature — Human KnightW

  White Plume Adventurer untaps all (or many) permanents, refreshing Basri, Tomorrow's Champion's tap activation.
• Giant Killer // Chop Down

  W2W

  Creature — Human Peasant // Instant — AdventureW

  White Plume Adventurer untaps all (or many) permanents, refreshing Giant Killer's tap activation.
• Hammerfist Giant

  4RR

  Creature — Giant WarriorR

  White Plume Adventurer untaps all (or many) permanents, refreshing Hammerfist Giant's tap activation.
• Ruby, Daring Tracker

  RG

  Legendary Creature — Human ScoutGR

  White Plume Adventurer untaps all (or many) permanents, refreshing Ruby, Daring Tracker's tap activation.

• WithTempestra, Dame of Games1RR

  Copy chain: each card copies the other (or both copy a third), generating arbitrary copies. These two can't keep the loop going alone — add one of these to complete it:

  Angelic Sleuth2WRose Room Treasurer3RProsperous Partnership1RWSharp-Eyed Rookie1GGemcutter Buccaneer3RGanax, Astral Hunter4R
  Show cards