Duress

Until end of turn, whenever a player taps an Island for mana, that player adds an additional U.

Destroy each nonland permanent with mana value X or less.

Reveal cards from the top of your library until you reveal a nonland card, then put all cards revealed this way into your hand.

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

Electrolyze deals 2 damage divided as you choose among one or two targets. Draw a card.

Cast this spell only if you control two or more Vampires. Destroy target creature. You gain 4 life.

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

Spend only black mana on X. Consume Spirit deals X damage to any target and you gain X life.