Confidence:StrongSolidPlausibleTentativeSpeculative

• Obsessive Pursuit

  1B

  EnchantmentB

  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 Greatsword of Tyr's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Arna Kennerüd, Skycaptain

  2WUB

  Legendary Creature — Human KnightBUW

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

  1RW

  EnchantmentRW

  Windcrag Siege makes Greatsword of Tyr's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Hermes, Overseer of Elpis

  3U

  Legendary Creature — Elder WizardU

  Both cards trigger when a permanent attacks — they fire together.
• Cloud, Midgar Mercenary

  WW

  Legendary Creature — Human Soldier MercenaryW

  Cloud, Midgar Mercenary makes Greatsword of Tyr's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Bonny Pall, Clearcutter

  3GUU

  Legendary Creature — Giant ScoutGU

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

  2WUB

  Legendary Creature — HorrorBUW

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

  1B

  EnchantmentB

  Both cards trigger when a permanent attacks — they fire together.
• Invasion of Tarkir // Defiant Thundermaw

  1R

  Battle — Siege // Creature — DragonR

  Both cards trigger when a permanent attacks — they fire together.
• Soaring Thought-Thief

  UB

  Creature — Human RogueBU

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

  1WW

  EnchantmentW

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

  2RW

  EnchantmentRW

  Both cards trigger when a permanent attacks — they fire together.
• Aurelia, the Law Above

  3RW

  Legendary Creature — AngelRW

  Both cards trigger when a permanent attacks — they fire together.
• Alibou, Ancient Witness

  3RW

  Legendary Artifact Creature — GolemRW

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

  1W

  Creature — Fox SamuraiW

  Both cards trigger when a permanent attacks — they fire together.
• Misty Mountains Raider

  4R

  Creature — Goblin SoldierR

  Both cards trigger when a permanent attacks — they fire together.
• Path of Bravery

  2W

  EnchantmentW

  Both cards trigger when a permanent attacks — they fire together.
• Guide of Souls

  W

  Creature — Human ClericW

  Both cards trigger when a permanent attacks — they fire together.
• Craig Boone, Novac Guard

  1RW

  Legendary Creature — Human SoldierRW

  Both cards trigger when a permanent attacks — they fire together.
• The Tenth Doctor

  3UR

  Legendary Creature — Time Lord DoctorRU

  Both cards trigger when a permanent attacks — they fire together.
• Mishra, Claimed by Gix

  2BR

  Legendary Creature — Phyrexian Human ArtificerBR

  Both cards trigger when a permanent attacks — they fire together.
• Mirror Room // Fractured Realm

  2U5UU

  Enchantment — Room // Enchantment — RoomU

  Mirror Room makes Greatsword of Tyr's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Grolnok, the Omnivore

  2GU

  Legendary Creature — FrogGU

  Both cards trigger when a permanent attacks — they fire together.
• Varina, Lich Queen

  1WUB

  Legendary Creature — Zombie WizardBUW

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