Confidence:StrongSolidPlausibleTentativeSpeculative

• Dark Leo & Shredder

  WB

  Legendary Creature — Mutant Ninja Turtle HumanBW

  Both cards produce the same kind of effect (shared token subtype).
• Aphelia, Viper Whisperer

  1B

  Legendary Creature — Gorgon AssassinBG

  Both cards produce the same kind of effect (shared token subtype).
• Sosuke's Summons

  2G

  SorceryG

  Both cards produce the same kind of effect (shared token subtype).
• Archivist of Gondor

  2U

  Creature — Human AdvisorU

  Both cards trigger on damage dealt — they fire together.
• 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 Mist-Syndicate Naga onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Helping Hand

  W

  SorceryW

  Helping Hand puts Mist-Syndicate Naga onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Unearth

  B

  SorceryB

  Unearth puts Mist-Syndicate Naga 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 Mist-Syndicate Naga 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.
• Can't Stay Away

  WB

  SorceryBW

  Can't Stay Away puts Mist-Syndicate Naga onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Vraska the Unseen

  3BG

  Legendary Planeswalker — VraskaBG

  Both cards trigger on damage dealt — they fire together.
• Xyris, the Writhing Storm

  2GUR

  Legendary Creature — Snake LeviathanGRU

  Both cards produce the same kind of effect (shared token subtype).
• Hapatra, Vizier of Poisons

  BG

  Legendary Creature — Human ClericBG

  Both cards produce the same kind of effect (shared token subtype).
• Priest of Fell Rites

  WB

  Creature — Human WarlockBW

  Priest of Fell Rites puts Mist-Syndicate Naga onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• The Rani

  1UBR

  Legendary Creature — Time Lord ScientistBRU

  Both cards trigger on damage dealt — they fire together.
• One with Nature

  G

  Enchantment — AuraG

  Both cards trigger on damage dealt — they fire together.
• Resistance Is Futile

  1B

  SorceryB

  Resistance Is Futile puts Mist-Syndicate Naga onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Gonti, Night Minister

  2BB

  Legendary Creature — Aetherborn RogueB

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

  XGG

  Creature — Snake HydraG

  Both cards produce the same kind of effect (shared token subtype).
• Lost Jitte

  1

  Legendary Artifact — EquipmentC

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

  1B

  Enchantment — AuraB

  Animate Dead puts Mist-Syndicate Naga onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Exhume

  1B

  SorceryB

  Exhume puts Mist-Syndicate Naga onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Return Triumphant

  1W

  SorceryW

  Return Triumphant puts Mist-Syndicate Naga onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Felix Five-Boots

  2BGU

  Legendary Creature — Ooze RogueBGU

  Felix Five-Boots makes Mist-Syndicate Naga's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.