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.

Helm of Obedience

{X}, {T}: Put the top card of target opponent's library into his or her graveyard. Continue doing this until you have put X cards or a creature card into that graveyard, whichever occurs first. If the last card put into the graveyard is a creature card, bury Helm of Obedience and put that creature into play under your control as though it were just cast. X cannot be equal to 0.

Transmute Artifact

Search through your library for one artifact and immediately place it into play; also, choose any artifact in play that you control and place it in its owner's graveyard. If the new artifact has a casting cost greater than that of the discarded one, you must pay the difference or Transmute Artifact fails and both artifacts are discarded. Shuffle your library after playing this card.

Thopter Foundry

{1}, Sacrifice a nontoken artifact: Put a 1/1 blue Thopter artifact creature token with flying onto the battlefield. You gain 1 life.

Toxic Deluge

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

City of Traitors

If you play any land, sacrifice City of Traitors. {T}: Add two colorless mana to your mana pool.

Trinisphere

As long as Trinisphere is untapped, each spell that would cost less than three mana to cast costs three mana to cast. (Additional mana in the cost may be paid with any color of mana or colorless mana. For example, a spell that would cost {1}{B} to cast costs {2}{B} to cast instead.)

Sword of the Meek

Equipped creature gets +1/+2. Equip {2} Whenever a 1/1 creature comes into play under your control, you may return Sword of the Meek from your graveyard to play, then attach it to that creature.

Witchbane Orb

When Witchbane Orb enters the battlefield, destroy all Curses attached to you. You have hexproof. (You can't be the target of spells or abilities your opponents control, including Aura spells.)

The Abyss

All players bury one target non-artifact creature under their control, if they have any, during their upkeep.

Misdirection

You may remove a blue card in your hand from the game instead of paying Misdirection's mana cost. Target spell with a single target targets another target instead.

Talisman of Dominance

{T}: Add {1} to your mana pool. {T}: Add {U} or {B} to your mana pool. Talisman of Dominance deals 1 damage to you.

Tezzeret, Agent of Bolas

+1: Look at the top five cards of your library. You may reveal an artifact card from among them and put it into your hand. Put the rest on the bottom of your library in any order. -1: Target artifact becomes a 5/5 artifact creature. -4: Target player loses X life and you gain X life, where X is twice the number of artifacts you control.

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.

Urborg, Tomb of Yawgmoth

Each land is a Swamp in addition to its other land types.

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.

Tezzeret the Seeker

+1: Untap up to two target artifacts. -X: Search your library for an artifact card with converted mana cost X or less and put it into play. Then shuffle your library. -5: Artifacts you control become 5/5 artifact creatures until end of turn.

Ensnaring Bridge

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

Mox Diamond

When Mox Diamond comes into play, choose and discard a land card or sacrifice Mox Diamond. {T}: Add one mana of any color to your mana pool. Play this ability as a mana source.

Academy Ruins

{T}: Add {1} to your mana pool. {1}{U}, {T}: Put target artifact card in your graveyard on top of your library.

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.

Engineered Plague

When Engineered Plague comes into play, choose a creature type. All creatures of the chosen type get -1/-1.

Lodestone Golem

Nonartifact spells cost {1} more to cast.

Polluted Delta

Ancient Tomb

Inventors' Fair

Padeem, Consul of Innovation

Walking Ballista

Leyline of the Void

If Leyline of the Void is in your opening hand, you may begin the game with it on the battlefield. If a card would be put into an opponent's graveyard from anywhere, exile it instead.

Island

({T}: Add {U}.)

Swamp

({T}: Add {B}.)