Witch Engine
Witch Engine {5}{B}
Creature - Horror | Power/Toughness: 4 / 4
Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
{T}: Add {B}{B}{B}{B} to your mana pool. Target opponent gains control of Witch Engine. (Activate this ability only any time you could cast an instant.)
Latest set: [USG] Urza's Saga ( R · #169 )