Languish

All creatures get -4/-4 until end of turn.

Mage-Ring Network

{T}: Add {1} to your mana pool. {1}, {T}: Put a storage counter on Mage-Ring Network. {T}, Remove X storage counters from Mage-Ring Network: Add {X} to your mana pool.

Read the Bones

Scry 2, then draw two cards. You lose 2 life. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

Ruinous Path

Grasp of Darkness

Call the Bloodline

From Under the Floorboards

Sinister Concoction

Tamiyo's Journal

To the Slaughter

Triskaidekaphobia

Sanitarium Skeleton

{2}{B}: Return Sanitarium Skeleton from your graveyard to your hand.