Blighted Fen

Search your library for up to two basic Forest cards, reveal those cards, and put one onto the battlefield tapped and the rest into your hand. Then shuffle. Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, search your library for up to three basic Forest cards instead of two.

Counter target spell unless its controller pays X.

Destroy target artifact. Smash to Smithereens deals 3 damage to that artifact's controller.

Goblin spells you cast cost 1 less to cast. Goblins you control have haste.

Search your library for a land card, reveal it, put it into your hand, then shuffle.

(C represents colorless mana.) Target creature gets +3/-3 until end of turn.

This land enters tapped. When this land enters, add one mana of any color. T: Add C. (C represents colorless mana.)

Devoid (This card has no color.) All creatures get -2/-2 until end of turn. If a creature would die this turn, exile it instead.