Creature -- Elf Wizard t: Choose target creature, then reveal the top card of your library. That creature's base power becomes X, where X is the revealed card's converted mana cost. (This effect lasts indefinitely.)
Skeletor, Lord of Darkness3UB
Legendary Creature -- Skeleton Wizard
Whenever you speak, if you don't speak in a piercing, nasal voice, sacrifice Skeletor, Lord of Darkness. 2UB, Sacrifice another creature: Gain control of target creature with power equal to or less than the sacrificed creature's power. 1B: Regenerate Skeletor, Lord of Darkness.
Creature -- Incarnation
At the beginning of your upkeep, sacrifice Madness unless you discard a card at random. 5BR, Exile Madness from your graveyard: For each creature target player controls, that player sacrifices that creature unless he or she discards a card at random.
Next: Markovian Stronghold
Cave of the Forgotten
Land t: Add 1 to your mana pool. t, Sacrifice Cave of the Forgotten: Spells and abilities your opponents control can't cause you to discard cards this turn. The runes on its walls are painted in ensorcelled pigments that never fade.
Next: Merrow Harpoon
Phantom of Myriad Colors6
Creature -- Spirit
Phantom of Myriad Colors is every color of mana lands you control could produce. 3: Another target creature that shares a color with Phantom of Myriad colors gets +1/+1 until end of turn.
Next: Awaken the Old Gods
Net of Lost Souls