Confidence:StrongSolidPlausibleTentativeSpeculative

• Clock of Omens

  4

  ArtifactC

  One-directional refresh: one card can untap permanents the other wants to reuse. Not self-sustaining on its own — the untapper has to keep showing up.
• Quintorius Kand

  3RW

  Legendary Planeswalker — QuintoriusRW

  Both cards trigger when a spell is cast — they fire together.
• Kasla, the Broken Halo

  3URW

  Legendary Creature — Angel AllyRUW

  Both cards trigger when a spell is cast — they fire together.
• Sorin of House Markov // Sorin, Ravenous Neonate

  1B

  Legendary Creature — Human Noble // Legendary Planeswalker — SorinBW

  Both cards trigger when a spell is cast — they fire together.
• Surtr, Fiery Jötun

  3RR

  Legendary Creature — Giant God WarriorR

  Both cards trigger when a spell is cast — they fire together.
• Scytheclaw Raptor

  2R

  Creature — DinosaurR

  Both cards trigger when a spell is cast — they fire together.
• Earthshaker

  4RR

  Creature — SpiritR

  Both cards trigger when a spell is cast — they fire together.
• Intellectual Offering

  4U

  InstantU

  Intellectual Offering untaps all (or many) permanents, refreshing Maturation Chamber's tap activation.
• Roiling Vortex

  1R

  EnchantmentR

  Both cards trigger when a spell is cast — they fire together.
• Urianger Augurelt

  WU

  Legendary Creature — Elf AdvisorUW

  Both cards trigger when a spell is cast — they fire together.
• Aetherflux Reservoir

  4

  ArtifactC

  Both cards trigger when a spell is cast — they fire together.
• Flaming Tyrannosaurus

  5RR

  Creature — DinosaurR

  Both cards trigger when a spell is cast — they fire together.
• Song of the Worldsoul

  4WW

  EnchantmentW

  Both cards trigger when a spell is cast — they fire together.
• Firja, Judge of Valor

  2WBB

  Legendary Creature — Angel ClericBW

  Both cards trigger when a spell is cast — they fire together.
• Unstoppable Plan

  2U

  EnchantmentU

  Unstoppable Plan untaps all (or many) permanents, refreshing Maturation Chamber's tap activation.
• Invasion of Karsus // Refraction Elemental

  2RR

  Battle — Siege // Creature — ElementalR

  Both cards trigger when a spell is cast — they fire together.
• Captain Ripley Vance

  2R

  Legendary Creature — Human PirateR

  Both cards trigger when a spell is cast — they fire together.
• Thrull Parasite

  B

  Creature — ThrullB

  Both cards trigger when a spell is cast — they fire together.
• Syndic of Tithes

  1W

  Creature — Human ClericW

  Both cards trigger when a spell is cast — they fire together.
• Treasury Thrull

  4WB

  Creature — ThrullBW

  Both cards trigger when a spell is cast — they fire together.
• Unwinding Clock

  4

  ArtifactC

  Unwinding Clock untaps all (or many) permanents, refreshing Maturation Chamber's tap activation.
• Seedborn Muse

  3GG

  Creature — SpiritG

  Seedborn Muse untaps all (or many) permanents, refreshing Maturation Chamber's tap activation.
• Labyrinth Champion

  3R

  Creature — Human WarriorR

  Both cards trigger when a spell is cast — they fire together.
• Syndicate Heavy

  2W/BW/B

  Creature — Giant RogueBW

  Both cards trigger when a spell is cast — they fire together.
• The Kingpin of Crime

  1WB

  Legendary Creature — Human VillainBW

  Both cards trigger when a spell is cast — they fire together.