Confidence:StrongSolidPlausibleTentativeSpeculative

• The Millennium Calendar

  1

  Legendary ArtifactC

  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 Zone

  4G

  EnchantmentG

  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.
• Elrond, Moon-Reader

  2U

  Legendary Creature — Elf NobleU

  Tekuthal, Inquiry Dominus has activated abilities that aren't mana abilities, fueling Elrond, Moon-Reader's activation-trigger.
• Rings of Brighthearth

  3

  ArtifactC

  Tekuthal, Inquiry Dominus has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Illusionist's Bracers

  2

  Artifact — EquipmentC

  Tekuthal, Inquiry Dominus has activated abilities that aren't mana abilities, fueling Illusionist's Bracers's activation-trigger.