Chain Lightning

Chain Lightning deals 3 damage to any target. Then that player or that permanent's controller may pay {R}{R}. If the player does, they may copy this spell and may choose a new target for that copy.

Psionic Blast

Psionic Blast deals 4 damage to any target and 2 damage to you.

Fork

Copy target instant or sorcery spell, except that the copy is red. You may choose new targets for the copy.

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Fireball

This spell costs {1} more to cast for each target beyond the first.
Fireball deals X damage divided evenly, rounded down, among any number of targets.

Storm Seeker

Storm Seeker deals damage to target player equal to the number of cards in that player's hand.