Confidence:StrongSolidPlausibleTentativeSpeculative

• Sarkhan's Unsealing

  3R

  EnchantmentR

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

  3RW

  Legendary Planeswalker — QuintoriusRW

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

  B

  SorceryB

  Reanimate puts Baron Helmut Zemo onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Helping Hand

  W

  SorceryW

  Helping Hand puts Baron Helmut Zemo onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Unearth

  B

  SorceryB

  Unearth puts Baron Helmut Zemo onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Kasla, the Broken Halo

  3URW

  Legendary Creature — Angel AllyRUW

  Both cards trigger when a spell is cast — they fire together.
• Grave Researcher // Reanimate

  2BB

  Creature — Troll Warlock // SorceryB

  Grave Researcher puts Baron Helmut Zemo onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Pink Horror

  3UR

  Creature — Demon HorrorRU

  Both cards trigger when a spell is cast — they fire together.
• Ashling, Flame Dancer

  2RR

  Legendary Creature — Elemental ShamanR

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

  2R/WR/WR/W

  Creature — Spirit HorrorRW

  Both cards trigger when a spell is cast — they fire together.
• Tor Wauki the Younger

  3BR

  Legendary Creature — Human ArcherBR

  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.
• Aragorn, the Uniter

  RGWU

  Legendary Creature — Human NobleGRUW

  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.
• 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.
• Kozilek's Return

  2R

  InstantR

  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.
• Annie Joins Up

  1RGW

  Legendary EnchantmentGRW

  Annie Joins Up makes Baron Helmut Zemo's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• 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.
• Invasion of Karsus // Refraction Elemental

  2RR

  Battle — Siege // Creature — ElementalR

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