Confidence:StrongSolidPlausibleTentativeSpeculative

• Dragonback Assault

  3GUR

  EnchantmentGRU

  Dragonback Assault deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Urabrask // The Great Work

  2RR

  Legendary Creature — Phyrexian Praetor // Enchantment — SagaR

  Urabrask deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Rowan Kenrith

  4RR

  Legendary Planeswalker — RowanR

  Rowan Kenrith deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Flamebreak

  RRR

  SorceryR

  Flamebreak deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Chandra, Flamecaller

  4RR

  Legendary Planeswalker — ChandraR

  Chandra, Flamecaller deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Avengers Disassembled

  1RR

  SorceryR

  Avengers Disassembled deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Gruul Charm

  RG

  InstantGR

  Gruul Charm deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Let the Galaxy Burn

  X5R

  SorceryR

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

  2RR

  SorceryR

  Chain Reaction deals damage to many targets, fueling Callous Giant'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 Callous Giant's damage-payoff trigger.
• Slagstorm

  1RR

  SorceryR

  Slagstorm 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.
• All-Out Assault

  2RWB

  EnchantmentBRW

  All-Out Assault grants an extra combat phase, enabling Callous Giant's combat-trigger payoff.
• Archangel Avacyn // Avacyn, the Purifier

  3WW

  Legendary Creature — Angel // Legendary Creature — AngelRW

  Archangel Avacyn deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Firespout

  2R/G

  SorceryGR

  Firespout 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.
• Brotherhood's End

  1RR

  SorceryR

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

  X2R

  Creature — TyranidR

  Exocrine deals damage to many targets, fueling Callous Giant's damage-payoff trigger.
• Balthier and Fran

  1RG

  Legendary Creature — Human RabbitGR

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

  1RW

  SorceryRW

  Deafening Clarion 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.
• Incandescent Aria

  RGW

  SorceryGRW

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

  1BR

  InstantBR

  Spontaneous Combustion 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.
• Cyclone

  2GG

  EnchantmentG

  Cyclone deals damage to many targets, fueling Callous Giant's damage-payoff trigger.