Confidence:StrongSolidPlausibleTentativeSpeculative

• Skeleton Crew

  3B

  Creature — Skeleton PirateB

  Both cards produce the same kind of effect (shared token subtype).
• Daring Piracy

  2R

  EnchantmentR

  Both cards produce the same kind of effect (shared token subtype).
• Nettling Nuisance

  2B

  Creature — Faerie RogueB

  Both cards produce the same kind of effect (shared token subtype).
• Bloodline Recollector // Ancestral Craving

  1BB

  Creature — Vampire Warlock // InstantB

  Fathom Fleet Swordjack makes tokens that die on their own (decayed, sacrificed at end of turn or combat), feeding Bloodline Recollector's death trigger or its "if a creature died this turn" condition.
• Obsessive Pursuit

  1B

  EnchantmentB

  Both cards trigger when a permanent attacks — they fire together.
• Ignoble Hierarch

  G

  Creature — Goblin ShamanBGR

  Both cards trigger when a permanent attacks — they fire together.
• Noble Hierarch

  G

  Creature — Human DruidGUW

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

  B

  SorceryB

  Reanimate puts Fathom Fleet Swordjack onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Bard, Heir of Girion

  2WU

  Legendary Creature — Human ArcherUW

  Both cards trigger when a permanent attacks — they fire together.
• Garruk, Curse Breaker

  3GG

  Legendary Planeswalker — GarrukG

  Both cards trigger when a permanent attacks — they fire together.
• Combat Calligrapher

  3W

  Creature — Bird ClericW

  Both cards trigger when a permanent attacks — they fire together.
• Winota, Joiner of Forces

  2RW

  Legendary Creature — Human WarriorRW

  Both cards trigger when a permanent attacks — they fire together.
• Gallia of the Endless Dance

  RG

  Legendary Creature — SatyrGR

  Both cards trigger when a permanent attacks — they fire together.
• Jon Irenicus, Shattered One

  2UB

  Legendary Creature — Elf WizardBU

  Both cards trigger when a permanent attacks — they fire together.
• Clavileño, First of the Blessed

  1WB

  Legendary Creature — Vampire ClericBW

  Both cards trigger when a permanent attacks — they fire together.
• Grave Researcher // Reanimate

  2BB

  Creature — Troll Warlock // SorceryB

  Grave Researcher puts Fathom Fleet Swordjack onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Twenty-Toed Toad

  3U

  Creature — Frog WizardU

  Both cards trigger when a permanent attacks — they fire together.
• Vraska, Relic Seeker

  4BG

  Legendary Planeswalker — VraskaBG

  Both cards produce the same kind of effect (shared token subtype).
• Lagomos, Hand of Hatred

  1BR

  Legendary Creature — Human ShamanBR

  Fathom Fleet Swordjack makes tokens that die on their own (decayed, sacrificed at end of turn or combat), feeding Lagomos, Hand of Hatred's death trigger or its "if a creature died this turn" condition.
• Isshin, Two Heavens as One

  RWB

  Legendary Creature — Human SamuraiBRW

  Isshin, Two Heavens as One makes Fathom Fleet Swordjack's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Hooded Blightfang

  2B

  Creature — SnakeB

  Both cards trigger when a permanent attacks — they fire together.
• Loot Dispute

  3R

  EnchantmentR

  Both cards trigger when a permanent attacks — they fire together.
• Dyadrine, Synthesis Amalgam

  XGW

  Legendary Artifact Creature — ConstructGW

  Both cards trigger when a permanent attacks — they fire together.
• Malicious Affliction

  BB

  InstantB

  Fathom Fleet Swordjack makes tokens that die on their own (decayed, sacrificed at end of turn or combat), feeding Malicious Affliction's death trigger or its "if a creature died this turn" condition.
• Banon, the Returners' Leader

  RW

  Legendary Creature — Human Cleric RebelRW

  Both cards trigger when a permanent attacks — they fire together.