Chaotic Backlash

Chaotic Backlash deals damage to target player equal to twice the number of white and/or blue permanents they control.

Spinal Villain

Scald

Whenever a player taps an Island for mana, Scald deals 1 damage to that player.

Mountain

Curse of Marit Lage

When Curse of Marit Lage enters, tap all Islands.
Islands don't untap during their controllers' untap steps.

Guttural Response

Magnetic Mountain

Blue creatures don't untap during their controllers' untap steps.
At the beginning of each player's upkeep, that player may choose any number of tapped blue creatures they control and pay {4} for each creature chosen this way. If the player does, untap those creatures.

Burnout

Counter target instant spell if it's blue.
Draw a card at the beginning of the next turn's upkeep.

Red Elemental Blast

Choose one —
• Counter target blue spell.
• Destroy target blue permanent.

This spell can't be countered.
Fry deals 5 damage to target creature or planeswalker that's white or blue.

Parch

Choose one —
• Parch deals 2 damage to any target.
• Parch deals 4 damage to target blue creature.