Mind Twist

Target player discards X cards at random.

Swamp

Disrupting Scepter

{3}, {T}: Target player discards a card. Activate only during your turn.

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Sol Ring

Power Surge

At the beginning of each player's upkeep, Power Surge deals X damage to that player, where X is the number of untapped lands they controlled at the beginning of this turn.

Disintegrate

Disintegrate deals X damage to any target. If it's a creature, it can't be regenerated this turn, and if it would die this turn, exile it instead.

The Rack

As The Rack enters, choose an opponent.
At the beginning of the chosen player's upkeep, The Rack deals X damage to that player, where X is 3 minus the number of cards in their hand.

Shatter

Mountain

Demonic Tutor

Search your library for a card, put that card into your hand, then shuffle.

Hypnotic Specter

Flying
Whenever Hypnotic Specter deals damage to an opponent, that player discards a card at random.

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.