Spellshock

Whenever an opponent casts a creature spell, this enchantment deals 1 damage to that player.

Whenever a player casts a spell with mana value 3 or less, this enchantment deals 2 damage to that player.

Whenever a player casts a red spell, you may pay . If you do, this enchantment deals 1 damage to any target.

Whenever you cast a creature spell, this enchantment deals 1 damage to target player or planeswalker.

Whenever a player taps a land for mana, this enchantment deals 1 damage to that player.

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