Electrolyze

Return all permanents of the color of your choice to their owners' hands.

Search target opponent's library for an artifact card and put that card onto the battlefield under your control. Then that player shuffles.

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

Destroy each nonland permanent with mana value X or less.

Breath of Malfegor deals 5 damage to each opponent.

Enchant creature Enchanted creature can't attack or block, and its activated abilities can't be activated.

Choose artifact, creature, or land. Tap all untapped permanents of the chosen type target player controls, or untap all tapped permanents of that type that player controls.

Corrupt deals damage to any target equal to the number of Swamps you control. You gain life equal to the damage dealt this way.