Confidence:StrongSolidPlausibleTentativeSpeculative

• Delney, Streetwise Lookout

  2W

  Legendary Creature — Human ScoutW

  Delney, Streetwise Lookout makes Serpentine Basilisk's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Roaming Throne

  4

  Artifact Creature — GolemC

  Roaming Throne makes Serpentine Basilisk's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Mirror Room // Fractured Realm

  2U5UU

  Enchantment — Room // Enchantment — RoomU

  Mirror Room makes Serpentine Basilisk's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Wizard's Staff

  1U

  Artifact — EquipmentU

  Wizard's Staff makes Serpentine Basilisk's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Sygg, Wanderwine Wisdom // Sygg, Wanderbrine Shield

  1U

  Legendary Creature — Merfolk Wizard // Legendary Creature — Merfolk RogueUW

  Both cards trigger on damage dealt — they fire together.
• Reanimate

  B

  SorceryB

  Reanimate puts Serpentine Basilisk onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Fblthp, Impossibly Lost

  1U

  Legendary Creature — HomunculusU

  Both cards trigger on damage dealt — they fire together.
• Grave Researcher // Reanimate

  2BB

  Creature — Troll Warlock // SorceryB

  Grave Researcher puts Serpentine Basilisk onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• The Beast, Deathless Prince

  2BR

  Legendary Creature — DemonBR

  Both cards trigger on damage dealt — they fire together.
• Vraska the Unseen

  3BG

  Legendary Planeswalker — VraskaBG

  Both cards trigger on damage dealt — they fire together.
• Sefris of the Hidden Ways

  WUB

  Legendary Creature — Human WizardBUW

  Sefris of the Hidden Ways puts Serpentine Basilisk onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Cryoshatter

  U

  Enchantment — AuraU

  Both cards trigger on damage dealt — they fire together.
• Recurring Nightmare

  2B

  EnchantmentB

  Recurring Nightmare puts Serpentine Basilisk 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 Serpentine Basilisk onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Sleep Magic

  U

  Enchantment — AuraU

  Both cards trigger on damage dealt — they fire together.
• Lost Jitte

  1

  Legendary Artifact — EquipmentC

  Both cards trigger on damage dealt — they fire together.
• Animate Dead

  1B

  Enchantment — AuraB

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

  1B

  SorceryB

  Exhume puts Serpentine Basilisk onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Life // Death

  G1B

  Sorcery // SorceryBG

  Life puts Serpentine Basilisk onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Puppet Master, String Puller

  2R

  Legendary Creature — Human Artificer VillainR

  Both cards trigger on damage dealt — they fire together.
• Dance of the Dead

  1B

  Enchantment — AuraB

  Dance of the Dead puts Serpentine Basilisk onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Victimize

  2B

  SorceryB

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

  1B

  SorceryB

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

  BB

  SorceryB

  Soul Exchange puts Serpentine Basilisk onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Balthier and Fran

  1RG

  Legendary Creature — Human RabbitGR

  Balthier and Fran grants an extra combat phase, enabling Serpentine Basilisk's combat-trigger payoff.