Force of Will

You may pay 1 life and remove a blue card in your hand from the game instead of paying Force of Will's casting cost. Effects that prevent or redirect damage cannot be used to counter this loss of life. Counter target spell.

Cavern of Souls

As Cavern of Souls enters the battlefield, choose a creature type. {T}: Add {1} to your mana pool. {T}: Add one mana of any color to your mana pool. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.

Toxic Deluge

As an additional cost to cast Toxic Deluge, pay X life. All creatures get -X/-X until end of turn.

Gurmag Angler

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)

Monastery Mentor

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) Whenever you cast a noncreature spell, put a 1/1 white Monk creature token with prowess onto the battlefield.

Urza's Bauble

{T}: Sacrifice Urza's Bauble to choose a card at random from target player's hand; look at that card. Ignore this ability if that player has no cards left in hand. Draw a card at the beginning of the next turn's upkeep.

Snapcaster Mage

Flash When Snapcaster Mage enters the battlefield, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)

Engineered Explosives

Sunburst (This enters the battlefield with a charge counter on it for each color of mana spent to cast it.) {2}, Sacrifice Engineered Explosives: Destroy each nonland permanent with converted mana cost equal to the number of charge counters on Engineered Explosives.

Cabal Therapy

Name a nonland card. Target player reveals his or her hand and discards all cards with that name. Flashback-Sacrifice a creature. (You may play this card from your graveyard for its flashback cost. Then remove it from the game.)

Ponder

Gitaxian Probe

({U/P} can be paid with either {U} or 2 life.) Look at target player's hand. Draw a card.

Erayo, Soratami Ascendant

Flying Whenever the fourth spell of a turn is played, flip Erayo, Soratami Ascendant. ——— Erayo's Essence Legendary Enchantment Whenever an opponent plays a spell for the first time in a turn, counter that spell.

Underground Sea

Counts as both swamp and islands and is affected by spells that affect either. Tap to add either {B} or {U} to your mana pool.

Tundra

Counts as both islands and plains and is affected by spells that affect either. Tap to add either {U} or {W} to your mana pool.

Swords to Plowshares

Target creature is removed from game entirely; return to owner's deck only when game is over. Creature's controller gains life points equal to creature's power.

Flooded Strand

Polluted Delta

Brainstorm

Fatal Push

Plains

({T}: Add {W}.)

Island

({T}: Add {U}.)