Counterspell

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

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

Target player draws three cards. Then that player discards two cards unless they discard a land card.

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

Scry 1. (Look at the top card of your library. You may put that card on the bottom.)
Draw a card.

Counter target spell. If that spell is countered this way, put it on top of its owner's library instead of into that player's graveyard.

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

Draw two cards, then discard two cards.
Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Look at the top three cards of your library. Put one of them into your hand and the rest into your graveyard.

Draw three cards, then put two cards from your hand on top of your library in any order.

Haste
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)