Confidence:StrongSolidPlausibleTentativeSpeculative

• Grist, Voracious Larva // Grist, the Plague Swarm

  G

  Legendary Creature — Insect // Legendary Planeswalker — GristBG

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

  1BG

  Creature — InsectBG

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

  3B

  Legendary Creature — Vampire InsectB

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

  3G

  Creature — Human ShamanG

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

  4U

  InstantU

  Intellectual Offering untaps all (or many) permanents, refreshing Trigon of Infestation's tap activation.
• The Swarmweaver

  2BG

  Legendary Artifact Creature — ScarecrowBG

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

  2W

  EnchantmentW

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

  2U

  EnchantmentU

  Unstoppable Plan untaps all (or many) permanents, refreshing Trigon of Infestation's tap activation.
• Gift of Compleation

  1B

  EnchantmentB

  Both cards produce the same kind of effect (shared token subtype).
• Amzu, Swarm's Hunger

  3BG

  Legendary Creature — Insect ShamanBG

  Both cards produce the same kind of effect (shared token subtype).
• Vrestin, Menoptra Leader

  XGGW

  Legendary Creature — Alien Insect ScoutGW

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

  3GG

  Creature — SpiritG

  Seedborn Muse untaps all (or many) permanents, refreshing Trigon of Infestation's tap activation.
• Unwinding Clock

  4

  ArtifactC

  Unwinding Clock untaps all (or many) permanents, refreshing Trigon of Infestation's tap activation.
• Bloated Processor

  2B

  Creature — PhyrexianB

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

  6W

  Creature — Phyrexian ArtificerW

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

  3WW

  Creature — PhyrexianW

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

  1G

  Enchantment — ClassG

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.
• Paradox Engine

  5

  Legendary ArtifactC

  Paradox Engine untaps all (or many) permanents, refreshing Trigon of Infestation's tap activation.
• Sun-Blessed Guardian // Furnace-Blessed Conqueror

  1W

  Creature — Human Cleric // Creature — Phyrexian ClericRW

  Both cards produce the same kind of effect (shared token subtype).
• Aatchik, Emerald Radian

  3BBG

  Legendary Creature — Insect DruidBG

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

  1U

  InstantU

  Dramatic Reversal untaps all (or many) permanents, refreshing Trigon of Infestation's tap activation.
• Blinkmoth Infusion

  12UU

  InstantU

  Blinkmoth Infusion untaps all (or many) permanents, refreshing Trigon of Infestation's tap activation.
• Springheart Nantuko

  1G

  Enchantment Creature — Insect MonkG

  Both cards produce the same kind of effect (shared token subtype).
• Nissa, Ascended Animist

  3GGG/PG/P

  Legendary Planeswalker — NissaG

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

  5GG

  Creature — InsectG

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