Confidence:StrongSolidPlausibleTentativeSpeculative

• Summoner's Sending

  1W

  EnchantmentW

  Both cards produce the same kind of effect (shared token subtype).
• Invoke the Ancients

  1GGGG

  SorceryG

  Both cards produce the same kind of effect (shared token subtype).
• Hermes, Overseer of Elpis

  3U

  Legendary Creature — Elder WizardU

  Both cards trigger when a permanent attacks — they fire together.
• Arna Kennerüd, Skycaptain

  2WUB

  Legendary Creature — Human KnightBUW

  Both cards trigger when a permanent attacks — they fire together.
• Antiquities on the Loose

  1WW

  SorceryW

  Both cards produce the same kind of effect (shared token subtype).
• Kykar, Wind's Fury

  1URW

  Legendary Creature — Bird WizardRUW

  Both cards produce the same kind of effect (shared token subtype).
• Soaring Thought-Thief

  UB

  Creature — Human RogueBU

  Both cards trigger when a permanent attacks — they fire together.
• Quintorius, Loremaster

  3RW

  Legendary Creature — Elephant ClericRW

  Both cards produce the same kind of effect (shared token subtype).
• Hofri Ghostforge

  3RW

  Legendary Creature — Dwarf ClericRW

  Both cards produce the same kind of effect (shared token subtype).
• Baboon Spirit

  2U

  Creature — Monkey SpiritU

  Both cards produce the same kind of effect (shared token subtype).
• Obscura Ascendancy

  WUB

  EnchantmentBUW

  Both cards produce the same kind of effect (shared token subtype).
• Guide of Souls

  W

  Creature — Human ClericW

  Both cards trigger when a permanent attacks — they fire together.
• Champions from Beyond

  XWW

  EnchantmentW

  Both cards trigger when a permanent attacks — they fire together.
• Grolnok, the Omnivore

  2GU

  Legendary Creature — FrogGU

  Both cards trigger when a permanent attacks — they fire together.
• Spirit Bonds

  1W

  EnchantmentW

  Both cards produce the same kind of effect (shared token subtype).
• Thalia's Geistcaller

  2W

  Creature — Human ClericW

  Both cards produce the same kind of effect (shared token subtype).
• Oyobi, Who Split the Heavens

  6W

  Legendary Creature — SpiritW

  Both cards produce the same kind of effect (shared token subtype).
• Arboreal Alliance

  XGG

  EnchantmentG

  Both cards trigger when a permanent attacks — they fire together.
• Quintorius, Field Historian

  3RW

  Legendary Creature — Elephant ClericRW

  Both cards produce the same kind of effect (shared token subtype).
• Sekki, Seasons' Guide

  5GGG

  Legendary Creature — SpiritG

  Both cards produce the same kind of effect (shared token subtype).
• Craig Boone, Novac Guard

  1RW

  Legendary Creature — Human SoldierRW

  Both cards trigger when a permanent attacks — they fire together.
• Shard of Broken Glass

  1

  Artifact — EquipmentC

  Both cards trigger when a permanent attacks — they fire together.
• Dromoka, the Eternal

  3GW

  Legendary Creature — DragonGW

  Both cards trigger when a permanent attacks — they fire together.
• Riddlekeeper

  2U

  Creature — HomunculusU

  Both cards trigger when a permanent attacks — they fire together.
• Sorcerer's Broom

  2

  Artifact Creature — SpiritC

  Both cards produce the same kind of effect (shared token subtype).

• Completes Thelonite Druid × Thornbite Staff

  Untap loop: each card untaps the other, generating arbitrary activations or mana. The pair can't keep the loop going alone — this card supplies the missing piece.

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