Confidence:StrongSolidPlausibleTentativeSpeculative

• Reanimate

  B

  SorceryB

  Reanimate puts Valakut Fireboar onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Grave Researcher // Reanimate

  2BB

  Creature — Troll Warlock // SorceryB

  Grave Researcher puts Valakut Fireboar onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Yore-Tiller Nephilim

  WUBR

  Creature — NephilimBRUW

  Yore-Tiller Nephilim puts Valakut Fireboar onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Sefris of the Hidden Ways

  WUB

  Legendary Creature — Human WizardBUW

  Sefris of the Hidden Ways puts Valakut Fireboar onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Recurring Nightmare

  2B

  EnchantmentB

  Recurring Nightmare puts Valakut Fireboar onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Priest of Fell Rites

  WB

  Creature — Human WarlockBW

  Priest of Fell Rites puts Valakut Fireboar onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Liliana, Waker of the Dead

  2BB

  Legendary Planeswalker — LilianaB

  Liliana, Waker of the Dead puts Valakut Fireboar onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Animate Dead

  1B

  Enchantment — AuraB

  Animate Dead puts Valakut Fireboar onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Exhume

  1B

  SorceryB

  Exhume puts Valakut Fireboar onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Hell's Caretaker

  3B

  Creature — HorrorB

  Hell's Caretaker puts Valakut Fireboar onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Life // Death

  G1B

  Sorcery // SorceryBG

  Life puts Valakut Fireboar onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Kardur's Vicious Return

  2BR

  Enchantment — SagaBR

  Kardur's Vicious Return puts Valakut Fireboar onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Godo, Bandit Warlord

  5R

  Legendary Creature — Human BarbarianR

  Godo, Bandit Warlord grants an extra combat phase, enabling Valakut Fireboar's combat-trigger payoff.
• Dance of the Dead

  1B

  Enchantment — AuraB

  Dance of the Dead puts Valakut Fireboar onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Meren of Clan Nel Toth

  2BG

  Legendary Creature — Human ShamanBG

  Meren of Clan Nel Toth puts Valakut Fireboar onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• All-Out Assault

  2RWB

  EnchantmentBRW

  All-Out Assault grants an extra combat phase, enabling Valakut Fireboar's combat-trigger payoff.
• Victimize

  2B

  SorceryB

  Victimize puts Valakut Fireboar onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Persist

  1B

  SorceryB

  Persist puts Valakut Fireboar onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Soul Exchange

  BB

  SorceryB

  Soul Exchange puts Valakut Fireboar onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Zariel, Archduke of Avernus

  2RR

  Legendary Planeswalker — ZarielR

  Zariel, Archduke of Avernus grants an extra combat phase, enabling Valakut Fireboar's combat-trigger payoff.
• Balthier and Fran

  1RG

  Legendary Creature — Human RabbitGR

  Balthier and Fran grants an extra combat phase, enabling Valakut Fireboar's combat-trigger payoff.
• Bruce Banner // The Incredible Hulk

  U2RRGG

  Legendary Creature — Human Scientist Hero // Legendary Creature — Gamma Berserker HeroGRU

  Bruce Banner grants an extra combat phase, enabling Valakut Fireboar's combat-trigger payoff.
• Ral Zarek

  2UR

  Legendary Planeswalker — RalRU

  Ral Zarek grants an extra turn, enabling Valakut Fireboar's per-turn payoff.
• Ascent of the Worthy

  1WB

  Enchantment — SagaBW

  Ascent of the Worthy puts Valakut Fireboar onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Rite of the Moth

  1WBB

  SorceryBW

  Rite of the Moth puts Valakut Fireboar onto the battlefield from a graveyard without casting it, so its mana cost is never paid.