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.

Serum Powder

{T}: Add {1} to your mana pool. Any time you could mulligan and Serum Powder is in your hand, you may remove your hand from the game, then draw that many cards. (You can do this in addition to taking mulligans.)

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.

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.

Darkslick Shores

Darkslick Shores enters the battlefield tapped unless you control two or fewer other lands. {T}: Add {U} or {B} to your mana pool.

Underground River

{T}: Add {1} to your mana pool. {T}: Add {U} or {B} to your mana pool. Underground River 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.

Eldrazi Skyspawner

Sanctum of Ugin

Matter Reshaper

Reality Smasher

Spatial Contortion

Thought-Knot Seer

Wastes

Distended Mindbender

Elder Deep-Fiend

Eternal Scourge

Unclaimed Territory