Confidence:StrongSolidPlausibleTentativeSpeculative

• Wall Crawl

  3G

  EnchantmentG

  Both cards produce the same kind of effect (shared token subtype).
• Twitching Doll

  1G

  Artifact Creature — Spider ToyG

  Both cards produce the same kind of effect (shared token subtype).
• Izoni, Center of the Web

  4BG

  Legendary Creature — Elf DetectiveBG

  Both cards produce the same kind of effect (shared token subtype).
• Arasta of the Endless Web

  2GG

  Legendary Enchantment Creature — SpiderG

  Both cards produce the same kind of effect (shared token subtype).
• Lolth, Spider Queen

  3BB

  Legendary Planeswalker — LolthB

  Both cards produce the same kind of effect (shared token subtype).
• Renowned Weaver

  G

  Creature — Human ShamanG

  Both cards produce the same kind of effect (shared token subtype).
• Spiders-Man, Heroic Horde

  1G

  Legendary Creature — Spider HeroG

  Both cards produce the same kind of effect (shared token subtype).
• Peter Parker // Amazing Spider-Man

  1W1GWU

  Legendary Creature — Human Scientist Hero // Legendary Creature — Spider Human HeroGUW

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

  4B

  Creature — Elf SpiderB

  Both cards produce the same kind of effect (shared token subtype).
• Origin of Spider-Man

  1W

  Enchantment — SagaW

  Both cards produce the same kind of effect (shared token subtype).
• Ishkanah, Grafwidow

  4G

  Legendary Creature — SpiderBG

  Both cards produce the same kind of effect (shared token subtype).
• Penumbra Spider

  2GG

  Creature — SpiderG

  Both cards produce the same kind of effect (shared token subtype).
• Llanowar Druid

  1G

  Creature — Elf DruidG

  Refuel loop: one card's payoff untaps your lands, paying for the other's activation again — repeatable every turn, and often infinite.
• Twin-Silk Spider

  2G

  Creature — SpiderG

  Both cards produce the same kind of effect (shared token subtype).
• Brood Weaver

  3G

  Creature — SpiderG

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

  2G

  InstantG

  Both cards produce the same kind of effect (shared token subtype).
• Spider Spawning

  4G

  SorceryBG

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

  3G

  InstantG

  Both cards produce the same kind of effect (shared token subtype).
• Curse of Clinging Webs

  2G

  Enchantment — Aura CurseG

  Both cards produce the same kind of effect (shared token subtype).
• Innocuous Researcher

  3G

  Creature — Centaur DetectiveG

  Innocuous Researcher untaps lands, fueling Rotwidow Pack's mana-hungry effect.
• Fiery Gambit

  2R

  SorceryR

  Fiery Gambit untaps lands, fueling Rotwidow Pack's mana-hungry effect.
• Time Spiral

  4UU

  SorceryU

  Time Spiral untaps lands, fueling Rotwidow Pack's mana-hungry effect.
• Nissa, Vastwood Seer // Nissa, Sage Animist

  2G

  Legendary Creature — Elf Scout // Legendary Planeswalker — NissaG

  Nissa, Vastwood Seer untaps lands, fueling Rotwidow Pack's mana-hungry effect.
• Elrond, Moon-Reader

  2U

  Legendary Creature — Elf NobleU

  Rotwidow Pack has activated abilities that aren't mana abilities, fueling Elrond, Moon-Reader's activation-trigger.
• Nissa, Worldwaker

  3GG

  Legendary Planeswalker — NissaG

  Nissa, Worldwaker untaps lands, fueling Rotwidow Pack's mana-hungry effect.