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.)

Magus of the Moon

Nonbasic lands are Mountains.

Snow-Covered Mountain

{T}: Add {R} to your mana pool.

Goblin Rabblemaster

Other Goblin creatures you control attack each turn if able. At the beginning of combat on your turn, put a 1/1 red Goblin creature token with haste onto the battlefield. Whenever Goblin Rabblemaster attacks, it gets +1/+0 until end of turn for each other attacking Goblin.

Pia and Kiran Nalaar

When Pia and Kiran Nalaar enters the battlefield, put two 1/1 colorless Thopter artifact creature tokens with flying onto the battlefield. {2}{R}, Sacrifice an artifact: Pia and Kiran Nalaar deals 2 damage to target creature or player.

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.

Simian Spirit Guide

Remove Simian Spirit Guide in your hand from the game: Add {R} to your mana pool.

Chrome Mox

Imprint — When Chrome Mox enters the battlefield, you may exile a nonartifact, nonland card from your hand. {T}: Add one mana of any of the exiled card's colors to your mana pool.

Ensnaring Bridge

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

Blood Moon

All non-basic lands are now basic mountains.

Fiery Confluence

Kozilek's Return

Ancient Tomb

Chandra, Torch of Defiance

Hazoret the Fervent

Mountain

({T}: Add {R}.)