Confidence:StrongSolidPlausibleTentativeSpeculative

• Dragonback Assault

  3GUR

  EnchantmentGRU

  Dragonback Assault deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Bruce Banner // The Incredible Hulk

  U2RRGG

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

  Bruce Banner grants an extra combat phase, enabling Callous Giant's combat-trigger payoff.
• Fires of Mount Doom

  2R

  Legendary EnchantmentR

  Fires of Mount Doom produces broad damage that redirects through Callous Giant into something useful.
• All-Out Assault

  2RWB

  EnchantmentBRW

  All-Out Assault grants an extra combat phase, enabling Callous Giant's combat-trigger payoff.
• Aggravated Assault

  2R

  EnchantmentR

  Aggravated Assault grants an extra combat phase, enabling Callous Giant's combat-trigger payoff.
• Chandra, Flamecaller

  4RR

  Legendary Planeswalker — ChandraR

  Chandra, Flamecaller deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Mila, Crafty Companion // Lukka, Wayward Bonder

  1WW4RR

  Legendary Creature — Fox // Legendary Planeswalker — LukkaRW

  Mila, Crafty Companion produces broad damage that redirects through Callous Giant into something useful.
• Urabrask // The Great Work

  2RR

  Legendary Creature — Phyrexian Praetor // Enchantment — SagaR

  Urabrask deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Anger of the Gods

  1RR

  SorceryR

  Anger of the Gods deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Magma Phoenix

  3RR

  Creature — PhoenixR

  Magma Phoenix deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Godo, Bandit Warlord

  5R

  Legendary Creature — Human BarbarianR

  Godo, Bandit Warlord grants an extra combat phase, enabling Callous Giant's combat-trigger payoff.
• Balthier and Fran

  1RG

  Legendary Creature — Human RabbitGR

  Balthier and Fran grants an extra combat phase, enabling Callous Giant's combat-trigger payoff.
• Thunderwave

  2RR

  SorceryR

  Thunderwave deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Fury of the Horde

  5RR

  SorceryR

  Fury of the Horde grants an extra combat phase, enabling Callous Giant's combat-trigger payoff.
• Sulfurous Blast

  2RR

  InstantR

  Sulfurous Blast deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Deafening Clarion

  1RW

  SorceryRW

  Deafening Clarion deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Fear of Missing Out

  1R

  Enchantment Creature — NightmareR

  Fear of Missing Out grants an extra combat phase, enabling Callous Giant's combat-trigger payoff.
• Brotherhood's End

  1RR

  SorceryR

  Brotherhood's End deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Incandescent Aria

  RGW

  SorceryGRW

  Incandescent Aria deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Sweltering Suns

  1RR

  SorceryR

  Sweltering Suns deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Waves of Aggression

  3R/WR/W

  SorceryRW

  Waves of Aggression grants an extra combat phase, enabling Callous Giant's combat-trigger payoff.
• Exocrine

  X2R

  Creature — TyranidR

  Exocrine deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Swooping Pteranodon

  3RW

  Creature — DinosaurRW

  Swooping Pteranodon produces broad damage that redirects through Callous Giant into something useful.
• Éomer, Marshal of Rohan

  2RR

  Legendary Creature — Human KnightR

  Éomer, Marshal of Rohan grants an extra combat phase, enabling Callous Giant's combat-trigger payoff.
• Bumi, Unleashed

  3RG

  Legendary Creature — Human Noble AllyGR

  Bumi, Unleashed grants an extra combat phase, enabling Callous Giant's combat-trigger payoff.