Brute Strength

Target creature gets +3/+1 and gains trample until end of turn.

Festival Crasher

Whenever you cast an instant or sorcery spell, Festival Crasher gets +2/+0 until end of turn.

Flame Rift

Flame Rift deals 4 damage to each player.

Reckless Impulse

Exile the top two cards of your library. Until the end of your next turn, you may play those cards.

Shock

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Thrill of Possibility

As an additional cost to cast this spell, discard a card.
Draw two cards.

Demon Bolt

Demon Bolt deals 4 damage to target creature or planeswalker.
Foretell {R} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Mountain

Infuriate

Target creature gets +3/+2 until end of turn.

Brute Force

Target creature gets +3/+3 until end of turn.

Simian Spirit Guide

Exile Simian Spirit Guide from your hand: Add {R}.

Kiln Fiend

Whenever you cast an instant or sorcery spell, Kiln Fiend gets +3/+0 until end of turn.