Lodestone Bauble

{1}, {T}: Sacrifice Lodestone Bauble to put up to four target basic lands from any player's graveyard on top of his or her library in any order. That player draws a card at the beginning of the next turn's upkeep.

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.

Mishra's Bauble

{T}, Sacrifice Mishra's Bauble: Look at the top card of target player's library. Draw a card at the beginning of the next turn's upkeep.

Containment Priest

Flash If a nontoken creature would enter the battlefield and it wasn't cast, exile it instead.

City of Traitors

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

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.

Lion's Eye Diamond

Sacrifice Lion's Eye Diamond, Discard your hand: Add three mana of any one color to your mana pool. Play this ability as a mana source.

Auriok Salvagers

{1}{W}: Return target artifact card with converted mana cost 1 or less from your graveyard to your hand.

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.

Ancient Den

(Ancient Den isn't a spell.) {T}: Add {W} 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.

Lotus Petal

Sacrifice Lotus Petal: Add one mana of any color to your mana pool. Play this ability as a mana source.

Tormod's Crypt

{T}, Sacrifice Tormod's Crypt: Remove target player's graveyard from the game.

Defense Grid

During each player's turn, spells played by another player cost an additional {3}.

Ancient Tomb

Horizon Canopy

Walking Ballista

Disenchant

Destroy target artifact or enchantment.

Sorcerous Spyglass

As Sorcerous Spyglass enters the battlefield, look at an opponent's hand, then choose any card name. Activated abilities of sources with the chosen name can't be activated unless they're mana abilities.