Witch Engine

Creature - Horror 4/4, 5B (6)
Swampwalk

{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.)¹
Illus. Kev Walker

Gatherer Card Rulings [Nov 2009]

• 4/1/2008: Because the ability is targeted, it is not a mana ability. It can only be activated when you have priority, and goes on the stack like other non-mana abilities.

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard, MTGO Classic
Printings (1/6)	Urza's Saga (Rare)