Confidence:StrongSolidPlausibleTentativeSpeculative

• Esper Sentinel

  W

  Artifact Creature — Human SoldierW

  Both cards trigger when a spell is cast — they fire together.
• Voice of Resurgence

  GW

  Creature — ElementalGW

  Both cards trigger when a spell is cast — they fire together.
• Kai Winn, Faithless Leader

  1B

  Legendary Creature — Bajoran ClericB

  Both cards trigger when a spell is cast — they fire together.
• Reanimate

  B

  SorceryB

  Reanimate puts Boromir, Warden of the Tower onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Helping Hand

  W

  SorceryW

  Helping Hand puts Boromir, Warden of the Tower onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Unearth

  B

  SorceryB

  Unearth puts Boromir, Warden of the Tower onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Erayo, Soratami Ascendant // Erayo's Essence

  1U

  Legendary Creature — Moonfolk Monk // Legendary EnchantmentU

  Both cards trigger when a spell is cast — they fire together.
• Prosper, Tome-Bound

  2BR

  Legendary Creature — Tiefling WarlockBR

  Both cards trigger when a spell is cast — they fire together.
• Lavinia, Azorius Renegade

  WU

  Legendary Creature — Human SoldierUW

  Both cards trigger when a spell is cast — they fire together.
• Grave Researcher // Reanimate

  2BB

  Creature — Troll Warlock // SorceryB

  Grave Researcher puts Boromir, Warden of the Tower onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Veyran, Voice of Duality

  1UR

  Legendary Creature — Efreet WizardRU

  Veyran, Voice of Duality makes Boromir, Warden of the Tower's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Hermit of the Natterknolls // Lone Wolf of the Natterknolls

  2G

  Creature — Human Werewolf // Creature — WerewolfG

  Both cards trigger when a spell is cast — they fire together.
• Blink

  2UB

  Enchantment — SagaBU

  Both cards trigger when a spell is cast — they fire together.
• Can't Stay Away

  WB

  SorceryBW

  Can't Stay Away puts Boromir, Warden of the Tower onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Kambal, Consul of Allocation

  1WB

  Legendary Creature — Human AdvisorBW

  Both cards trigger when a spell is cast — they fire together.
• Ruric Thar, the Unbowed

  4RG

  Legendary Creature — Ogre WarriorGR

  Both cards trigger when a spell is cast — they fire together.
• Sauron, the Dark Lord

  3UBR

  Legendary Creature — Avatar HorrorBRU

  Both cards trigger when a spell is cast — they fire together.
• Priest of Fell Rites

  WB

  Creature — Human WarlockBW

  Priest of Fell Rites puts Boromir, Warden of the Tower onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Silverquill Silencer

  WB

  Creature — Human ClericBW

  Both cards trigger when a spell is cast — they fire together.
• Shadow in the Warp

  1RG

  EnchantmentGR

  Both cards trigger when a spell is cast — they fire together.
• Norin the Wary

  R

  Legendary Creature — Human WarriorR

  Both cards trigger when a spell is cast — they fire together.
• Aerial Extortionist

  3WW

  Creature — Bird SoldierW

  Both cards trigger when a spell is cast — they fire together.
• Scalding Viper // Steam Clean

  1R1U

  Creature — Elemental Snake // Sorcery — AdventureRU

  Both cards trigger when a spell is cast — they fire together.
• Niv-Mizzet, Parun

  UUURRR

  Legendary Creature — Dragon WizardRU

  Both cards trigger when a spell is cast — they fire together.
• Mai, Scornful Striker

  1B

  Legendary Creature — Human Noble AllyB

  Both cards trigger when a spell is cast — they fire together.