Confidence:StrongSolidPlausibleTentativeSpeculative

• Preacher of the Schism

  2B

  Creature — Vampire ClericB

  Both cards produce the same kind of effect (shared token subtype).
• Bloodline Keeper // Lord of Lineage

  2BB

  Creature — Vampire // Creature — VampireB

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

  2BB

  Legendary Planeswalker — SorinB

  Both cards produce the same kind of effect (shared token subtype).
• Promise of Aclazotz // Foul Rebirth

  1B2B

  Enchantment // Sorcery — AdventureB

  Both cards produce the same kind of effect (shared token subtype).
• Sorin, Lord of Innistrad

  2WB

  Legendary Planeswalker — SorinBW

  Both cards produce the same kind of effect (shared token subtype).
• Sorin, Grim Nemesis

  4WB

  Legendary Planeswalker — SorinBW

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

  XWW

  EnchantmentW

  Both cards produce the same kind of effect (shared token subtype).
• Sorin, Solemn Visitor

  2WB

  Legendary Planeswalker — SorinBW

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

  4U

  InstantU

  Intellectual Offering untaps all (or many) permanents, refreshing Glass-Cast Heart's tap activation.
• Baron Bertram Graywater

  2WB

  Legendary Creature — Vampire NobleBW

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

  2U

  EnchantmentU

  Unstoppable Plan untaps all (or many) permanents, refreshing Glass-Cast Heart's tap activation.
• Charismatic Conqueror

  1W

  Creature — Vampire SoldierW

  Both cards produce the same kind of effect (shared token subtype).
• Call to the Feast

  2WB

  SorceryBW

  Both cards produce the same kind of effect (shared token subtype).
• Kalitas, Bloodchief of Ghet

  5BB

  Legendary Creature — Vampire WarriorB

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

  3GG

  Creature — SpiritG

  Seedborn Muse untaps all (or many) permanents, refreshing Glass-Cast Heart's tap activation.
• Elenda's Hierophant

  2W

  Creature — Vampire ClericW

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

  1W

  Creature — Vampire SoldierW

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

  4

  ArtifactC

  Unwinding Clock untaps all (or many) permanents, refreshing Glass-Cast Heart's tap activation.
• Elenda and Azor

  3WUB

  Legendary Creature — Vampire Knight SphinxBUW

  Both cards produce the same kind of effect (shared token subtype).
• Vito, Fanatic of Aclazotz

  2WB

  Legendary Creature — Vampire DemonBW

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

  2W

  SorceryW

  Both cards produce the same kind of effect (shared token subtype).
• Elenda, the Dusk Rose

  2WB

  Legendary Creature — Vampire KnightBW

  Both cards produce the same kind of effect (shared token subtype).
• Edgar, Charmed Groom // Edgar Markov's Coffin

  2WB

  Legendary Creature — Vampire Noble // Legendary ArtifactBW

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

  3RWB

  Legendary Creature — Vampire KnightBRW

  Both cards produce the same kind of effect (shared token subtype).
• Hungry for More

  BR

  SorceryBR

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