Witch Engine USG/169

Set: Urza's Saga
Collector Code: USG/169
Name: Witch Engine
Type: Creature — Horror
Oracle text: Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) {T}: Add {B}{B}{B}{B}. Target opponent gains control of this creature. (Activate only as an instant.)
Rarity: Rare