Frostfire Blast

Choose one: Frostfire Blast deals 3 damage to target creature or player; or Frostfire Blast deals 2 damage to target creature or player and taps it. If that creature is red or blue, it doesn't untap during its controller's next untap step.
The flames of the dragon and the frost of the ice giant combined to create a deadly blast that could freeze even the fiercest inferno