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.

Riders of Gavony

Vigilance As Riders of Gavony enters the battlefield, choose a creature type. Human creatures you control have protection from creatures of the chosen type.

Thalia, Guardian of Thraben

First strike Noncreature spells cost {1} more to cast.

Auriok Champion

Protection from black and from red Whenever another creature comes into play, you may gain 1 life.

Champion of the Parish

Whenever another Human enters the battlefield under your control, put a +1/+1 counter on Champion of the Parish.

Mantis Rider

Flying, vigilance, haste

Phantasmal Image

You may have Phantasmal Image enter the battlefield as a copy of any creature on the battlefield, except it's an Illusion in addition to its other types and it gains "When this creature becomes the target of a spell or ability, sacrifice it."

Reclamation Sage

When Reclamation Sage enters the battlefield, you may destroy target artifact or enchantment.

Aether Vial

At the beginning of your upkeep, you may put a charge counter on ?ther Vial. {T}: You may put a creature card with converted mana cost equal to the number of charge counters on ?ther Vial from your hand onto the battlefield.

Gut Shot

({R/P} can be paid with either {R} or 2 life.) Gut Shot deals 1 damage to target creature or player.

Meddling Mage

As Meddling Mage comes into play, name a nonland card. The named card can't be played.

Ancient Ziggurat

{T}: Add one mana of any color to your mana pool. Spend this mana only to cast creature spells.

Dismember

({B/P} can be paid with either {B} or 2 life.) Target creature gets -5/-5 until end of turn.

Noble Hierarch

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.) {T}: Add {G}, {W}, or {U} to your mana pool.

Sin Collector

When Sin Collector enters the battlefield, target opponent reveals his or her hand. You choose an instant or sorcery card from it and exile that card.

Izzet Staticaster

Flash (You may cast this spell any time you could cast an instant.) Haste {T}: Izzet Staticaster deals 1 damage to target creature and each other creature with the same name as that creature.

Kataki, War's Wage

All artifacts have "At the beginning of your upkeep, sacrifice this artifact unless you pay {1}."

Seachrome Coast

Seachrome Coast enters the battlefield tapped unless you control two or fewer other lands. {T}: Add {W} or {U} to your mana pool.

Reflector Mage

Horizon Canopy

Thalia's Lieutenant

Kitesail Freebooter

1B

Unclaimed Territory

Damping Sphere

If a land is tapped for two or more mana, it produces {C} instead of any other type and amount. Each spell a player casts costs {1} more to cast for each other spell that player has cast this turn.

Plains

({T}: Add {W}.)

Island

({T}: Add {U}.)