Confidence:StrongSolidPlausibleTentativeSpeculative

• Dinosaurs on a Spaceship

  4RW

  Creature — DinosaurRW

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

  2R

  EnchantmentR

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

  3RG

  Creature — DinosaurGR

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

  3RG

  Creature — DinosaurGR

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

  5GG

  Creature — DinosaurG

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

  3RR

  Creature — Dinosaur DragonR

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

  1B

  EnchantmentB

  Both cards trigger when a permanent attacks — they fire together.
• Archivist of Gondor

  2U

  Creature — Human AdvisorU

  Both cards trigger on damage dealt — they fire together.
• Huatli, Warrior Poet

  3RW

  Legendary Planeswalker — HuatliRW

  Both cards produce the same kind of effect (shared token subtype).
• Sygg, Wanderwine Wisdom // Sygg, Wanderbrine Shield

  1U

  Legendary Creature — Merfolk Wizard // Legendary Creature — Merfolk RogueUW

  Both cards trigger on damage dealt — they fire together.
• Ignoble Hierarch

  G

  Creature — Goblin ShamanBGR

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

  G

  Creature — Human DruidGUW

  Both cards trigger when a permanent attacks — they fire together.
• Bard, Heir of Girion

  2WU

  Legendary Creature — Human ArcherUW

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

  B

  SorceryB

  Reanimate puts Scion of Calamity onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Garruk, Curse Breaker

  3GG

  Legendary Planeswalker — GarrukG

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

  3W

  Creature — Bird ClericW

  Both cards trigger when a permanent attacks — they fire together.
• Winota, Joiner of Forces

  2RW

  Legendary Creature — Human WarriorRW

  Both cards trigger when a permanent attacks — they fire together.
• Gallia of the Endless Dance

  RG

  Legendary Creature — SatyrGR

  Both cards trigger when a permanent attacks — they fire together.
• Jon Irenicus, Shattered One

  2UB

  Legendary Creature — Elf WizardBU

  Both cards trigger when a permanent attacks — they fire together.
• Clavileño, First of the Blessed

  1WB

  Legendary Creature — Vampire ClericBW

  Both cards trigger when a permanent attacks — they fire together.
• Grave Researcher // Reanimate

  2BB

  Creature — Troll Warlock // SorceryB

  Grave Researcher puts Scion of Calamity onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Twenty-Toed Toad

  3U

  Creature — Frog WizardU

  Both cards trigger when a permanent attacks — they fire together.
• Isshin, Two Heavens as One

  RWB

  Legendary Creature — Human SamuraiBRW

  Isshin, Two Heavens as One makes Scion of Calamity's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Hooded Blightfang

  2B

  Creature — SnakeB

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

  3R

  EnchantmentR

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