King's Assassin

{T}: Destroy target tapped creature. Activate only during your turn, before attackers are declared.

Mind Rot

Haste (This creature can attack and {T} as soon as it comes under your control.)

Volcanic Hammer deals 3 damage to any target.

Haste (This creature can attack and {T} as soon as it comes under your control.)
When Thundermare enters the battlefield, tap all other creatures.

Target opponent discards a card at random.

Destroy two target nonblack creatures. You lose 5 life.

Search your library for a card, then shuffle and put that card on top. You lose 2 life.

When Fire Imp enters the battlefield, it deals 2 damage to target creature.

When Undying Beast dies, put it on top of its owner's library.