Confidence:StrongSolidPlausibleTentativeSpeculative

• Spawning Kraken

  5U

  Creature — KrakenU

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

  4RR

  Legendary Planeswalker — ChandraR

  Chandra, Flamecaller deals damage to many targets, fueling Kiora, the Crashing Wave's damage-payoff trigger.
• Invasion of Segovia // Caetus, Sea Tyrant of Segovia

  2U

  Battle — Siege // Legendary Creature — SerpentU

  Both cards produce the same kind of effect (shared token subtype).
• Let the Galaxy Burn

  X5R

  SorceryR

  Let the Galaxy Burn deals damage to many targets, fueling Kiora, the Crashing Wave's damage-payoff trigger.
• Chain Reaction

  2RR

  SorceryR

  Chain Reaction deals damage to many targets, fueling Kiora, the Crashing Wave's damage-payoff trigger.
• Jack of Hearts, Volatile Hero

  1RR

  Legendary Creature — Alien Human HeroR

  Jack of Hearts, Volatile Hero deals damage to many targets, fueling Kiora, the Crashing Wave's damage-payoff trigger.
• Godo, Bandit Warlord

  5R

  Legendary Creature — Human BarbarianR

  Godo, Bandit Warlord grants an extra combat phase, enabling Kiora, the Crashing Wave's combat-trigger payoff.
• All-Out Assault

  2RWB

  EnchantmentBRW

  All-Out Assault grants an extra combat phase, enabling Kiora, the Crashing Wave's combat-trigger payoff.
• Exocrine

  X2R

  Creature — TyranidR

  Exocrine deals damage to many targets, fueling Kiora, the Crashing Wave's damage-payoff trigger.
• Balthier and Fran

  1RG

  Legendary Creature — Human RabbitGR

  Balthier and Fran grants an extra combat phase, enabling Kiora, the Crashing Wave's combat-trigger payoff.
• Bruce Banner // The Incredible Hulk

  U2RRGG

  Legendary Creature — Human Scientist Hero // Legendary Creature — Gamma Berserker HeroGRU

  Bruce Banner grants an extra combat phase, enabling Kiora, the Crashing Wave's combat-trigger payoff.
• Cyclone

  2GG

  EnchantmentG

  Cyclone deals damage to many targets, fueling Kiora, the Crashing Wave's damage-payoff trigger.
• Swooping Pteranodon

  3RW

  Creature — DinosaurRW

  Swooping Pteranodon produces broad damage that redirects through Kiora, the Crashing Wave into something useful.
• Subterranean Tremors

  XR

  SorceryR

  Subterranean Tremors deals damage to many targets, fueling Kiora, the Crashing Wave's damage-payoff trigger.
• Éomer, Marshal of Rohan

  2RR

  Legendary Creature — Human KnightR

  Éomer, Marshal of Rohan grants an extra combat phase, enabling Kiora, the Crashing Wave's combat-trigger payoff.
• Fear of Missing Out

  1R

  Enchantment Creature — NightmareR

  Fear of Missing Out grants an extra combat phase, enabling Kiora, the Crashing Wave's combat-trigger payoff.
• Heaven // Earth

  XGXRR

  Instant // SorceryGR

  Heaven deals damage to many targets, fueling Kiora, the Crashing Wave's damage-payoff trigger.
• Fault Line

  XRR

  InstantR

  Fault Line deals damage to many targets, fueling Kiora, the Crashing Wave's damage-payoff trigger.
• Missy

  3UBR

  Legendary Creature — Time Lord RogueBRU

  Missy produces broad damage that redirects through Kiora, the Crashing Wave into something useful.
• Magmasaur

  3RR

  Creature — Elemental DinosaurR

  Magmasaur deals damage to many targets, fueling Kiora, the Crashing Wave's damage-payoff trigger.
• Spiteful Banditry

  XRR

  EnchantmentR

  Spiteful Banditry deals damage to many targets, fueling Kiora, the Crashing Wave's damage-payoff trigger.
• Themberchaud

  4RRR

  Legendary Creature — DragonR

  Themberchaud deals damage to many targets, fueling Kiora, the Crashing Wave's damage-payoff trigger.
• Earthquake

  XR

  SorceryR

  Earthquake deals damage to many targets, fueling Kiora, the Crashing Wave's damage-payoff trigger.
• Rolling Earthquake

  XR

  SorceryR

  Rolling Earthquake deals damage to many targets, fueling Kiora, the Crashing Wave's damage-payoff trigger.
• Nibelheim Aflame

  2RR

  SorceryR

  Nibelheim Aflame deals damage to many targets, fueling Kiora, the Crashing Wave's damage-payoff trigger.