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.

Stubborn Denial

Counter target noncreature spell unless its controller pays {1}. Ferocious — If you control a creature with power 4 or greater, counter that spell instead.

Tomb of the Spirit Dragon

{T}: Add {1} to your mana pool. {2}, {T}: You gain 1 life for each colorless creature 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.

Gut Shot

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

Spellskite

{U/P}: Change a target of target spell or ability to Spellskite. ({U/P} can be paid with either {U} or 2 life.)

Dismember

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

Eldrazi Temple

{T}: Add {1} to your mana pool. {T}: Add {2} to your mana pool. Spend this mana only to cast colorless Eldrazi spells or activate abilities of colorless Eldrazi.

Ratchet Bomb

{T}: Put a charge counter on Ratchet Bomb. {T}, Sacrifice Ratchet Bomb: Destroy each nonland permanent with converted mana cost equal to the number of charge counters on Ratchet Bomb.

Relic of Progenitus

{T}: Target player removes a card in his or her graveyard from the game. {1}, Remove Relic of Progenitus from the game: Remove all graveyards from the game. Draw a card.

Hurkyl's Recall

Return all artifacts target player owns to his or her hand.

Shivan Reef

{T}: Add {1} to your mana pool. {T}: Add {U} or {R} to your mana pool. Shivan Reef deals 1 damage to you.

Gemstone Caverns

If Gemstone Caverns is in your opening hand and you're not playing first, you may begin the game with Gemstone Caverns in play with a luck counter on it. If you do, remove a card in your hand from the game. {T}: Add {1} to your mana pool. If Gemstone Caverns has a luck counter on it, instead add one mana of any color to your mana pool.

Scalding Tarn

Steam Vents

Drowner of Hope

Eldrazi Skyspawner

Endless One

Ruination Guide

Vile Aggregate

Eldrazi Mimic

Eldrazi Obligator

Reality Smasher

Thought-Knot Seer

Eye of Ugin

Island

({T}: Add {U}.)