Counter target spell. At the beginning of your next upkeep, pay {3}{U}{U}. If you don't, you lose the game.

Gift a tapped Fish (You may promise an opponent a gift as you cast this spell. If you do, they create a tapped 1/1 blue Fish creature token before its other effects.) Return target creature an opponent controls to its owner's hand. If the gift was promised, instead return target nonland permanent an opponent controls to its owner's hand.

Counter target noncreature spell unless its controller pays {2}.

Grapeshot deals 1 damage to any target. Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)

Exile the top card of your library. During your next turn, you may play that card. Storm (When you cast this spell, copy it for each spell cast before it this turn.)

Create two 1/1 red Goblin creature tokens. Storm (When you cast this spell, copy it for each spell cast before it this turn.)

If it's your turn, you may sacrifice a Mountain rather than pay this spell's mana cost. Mine Collapse deals 5 damage to target creature or planeswalker.

Each instant and sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. Flashback {4}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Flying Other Dragons you control get +1/+1. Storm (When you cast this spell, copy it for each spell cast before it this turn. Copies become tokens.)