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.

Toxic Deluge

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

Artificer's Intuition

{U}, Discard an artifact card from your hand: Search your library for an artifact card with converted mana cost 1 or less, reveal that card, and put it into your hand. Then shuffle your library.

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.

Chalice of the Void

Chalice of the Void enters the battlefield with X charge counters on it. Whenever a player casts a spell with converted mana cost equal to the number of charge counters on Chalice of the Void, counter that spell.

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.

Glimmervoid

At the beginning of the end step, if you control no artifacts, sacrifice Glimmervoid. {T}: Add one mana of any color to your mana pool.

Darksteel Citadel

Indestructible (Effects that say "destroy" don't destroy this land.) {T}: Add {1} to your mana pool.

Thoughtcast

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.) Draw two cards.

Seat of the Synod

(Seat of the Synod isn't a spell.) {T}: Add {U} to your mana pool.

Vault of Whispers

(Vault of Whispers isn't a spell.) {T}: Add {B} to your mana pool.

Baleful Strix

Flying, deathtouch When Baleful Strix enters the battlefield, draw a card.

Dimir Signet

{1}, {T}: Add {U}{B} to your mana pool.

Mox Opal

Metalcraft — {T}: Add one mana of any color to your mana pool. Activate this ability only if you control three or more artifacts.

Ensnaring Bridge

Each creature with power greater than the number of cards in your hand cannot attack.

Ancient Tomb

Inventors' Fair

Walking Ballista

Island

({T}: Add {U}.)