Confidence:StrongSolidPlausibleTentativeSpeculative

• Psychic Venom

  1U

  Enchantment — AuraU

  Both cards trigger when a permanent is tapped — they fire together.
• Chronic Flooding

  1U

  Enchantment — AuraU

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

  B

  SorceryB

  Reanimate puts Barbflare Gremlin 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 Barbflare Gremlin 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 Barbflare Gremlin onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Orcish Mine

  1RR

  Enchantment — AuraR

  Both cards trigger when a permanent is tapped — they fire together.
• Animate Dead

  1B

  Enchantment — AuraB

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

  1B

  SorceryB

  Exhume puts Barbflare Gremlin onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Regal Behemoth

  4GG

  Creature — DinosaurG

  Both cards trigger when a permanent is tapped — they fire together.
• Mirari's Wake

  3GW

  EnchantmentGW

  Both cards trigger when a permanent is tapped — they fire together.
• Trace of Abundance

  R/WG

  Enchantment — AuraGRW

  Both cards trigger when a permanent is tapped — they fire together.
• Zendikar Resurgent

  5GG

  EnchantmentG

  Both cards trigger when a permanent is tapped — they fire together.
• Life // Death

  G1B

  Sorcery // SorceryBG

  Life puts Barbflare Gremlin onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Mana Vortex

  1UU

  EnchantmentU

  Both cards trigger when a permanent is tapped — they fire together.
• Dance of the Dead

  1B

  Enchantment — AuraB

  Dance of the Dead puts Barbflare Gremlin onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Persist

  1B

  SorceryB

  Persist puts Barbflare Gremlin onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Forsaken Monument

  5

  Legendary ArtifactC

  Both cards trigger when a permanent is tapped — they fire together.
• Nissa, Who Shakes the World

  3GG

  Legendary Planeswalker — NissaG

  Both cards trigger when a permanent is tapped — they fire together.
• Soul Exchange

  BB

  SorceryB

  Soul Exchange puts Barbflare Gremlin onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Nikya of the Old Ways

  3RG

  Legendary Creature — Centaur DruidGR

  Both cards trigger when a permanent is tapped — they fire together.
• Groundchuck & Dirtbag

  4GG

  Legendary Creature — Ox Mole MutantG

  Both cards trigger when a permanent is tapped — they fire together.
• Immortal Coil

  2BB

  ArtifactB

  Both cards trigger when a permanent is tapped — they fire together.
• Roaming Throne

  4

  Artifact Creature — GolemC

  Roaming Throne makes Barbflare Gremlin's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Spreading Algae

  G

  Enchantment — AuraG

  Both cards trigger when a permanent is tapped — they fire together.
• Buried in the Garden

  2GW

  Enchantment — AuraGW

  Both cards trigger when a permanent is tapped — they fire together.