Mox Jet

The Wretched

At end of combat, gain control of all creatures blocking The Wretched for as long as you control The Wretched.

Xenic Poltergeist

{T}: Until your next upkeep, target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value.

Voodoo Doll

At the beginning of your upkeep, put a pin counter on Voodoo Doll.
At the beginning of your end step, if Voodoo Doll is untapped, destroy Voodoo Doll and it deals damage to you equal to the number of pin counters on it.
{X}{X}, {T}: Voodoo Doll deals damage equal to the number of pin counters on it to any target. X is the number of pin counters on Voodoo Doll.

Unholy Strength

Enchant creature
Enchanted creature gets +2/+1.

Demonic Tutor

Search your library for a card, put that card into your hand, then shuffle.