Confidence:StrongSolidPlausibleTentativeSpeculative

• Obsessive Pursuit

  1B

  EnchantmentB

  Both cards trigger when a permanent attacks — they fire together.
• Bruse Tarl, Roving Rancher

  2RW

  Legendary Creature — Human WarriorRW

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

  B

  SorceryB

  Reanimate puts Bonny Pall, Clearcutter onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• 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.
• 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 Bonny Pall, Clearcutter 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.
• 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.
• Dyadrine, Synthesis Amalgam

  XGW

  Legendary Artifact Creature — ConstructGW

  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.
• Ghalta and Mavren

  3GGWW

  Legendary Creature — Dinosaur VampireGW

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

  U

  Enchantment — AuraU

  Both cards trigger when a permanent attacks — they fire together.
• Inti, Seneschal of the Sun

  1R

  Legendary Creature — Human KnightR

  Both cards trigger when a permanent attacks — they fire together.
• Hermes, Overseer of Elpis

  3U

  Legendary Creature — Elder WizardU

  Both cards trigger when a permanent attacks — they fire together.
• Norin the Wary

  R

  Legendary Creature — Human WarriorR

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

  2R

  EnchantmentR

  Both cards trigger when a permanent attacks — they fire together.
• Mirrorhall Mimic // Ghastly Mimicry

  3U

  Creature — Spirit // Enchantment — AuraU

  One-shot copy enabler: a card enters as a copy of another (Phantasmal Image, Body Double, Phyrexian Metamorph), firing the partner's substantive ETB once. Not a repeating chain — fires once on entry — but valuable when the partner's ETB is combo-grade (graveyard reanimator, mana doubler, etc.).
• Tadeas, Juniper Ascendant

  2GW

  Legendary Creature — Human MonkGW

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

  R

  Creature — PhoenixR

  Both cards trigger when a permanent attacks — they fire together.
• Invasion of New Capenna // Holy Frazzle-Cannon

  WB

  Battle — Siege // Artifact — EquipmentBW

  Both cards trigger when a permanent attacks — they fire together.
• The Earth King

  3G

  Legendary Creature — Human Noble AllyG

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

  BG

  EnchantmentBG

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