Barl's Cage

Artifact, 4 (4)
{3}: Target creature doesn't untap during its controller's next untap step.¹
For a dozen years the Cage had held Lord Ith, but as the Pretender Mairsil's power weakened, so did the bars.
Illus. Tom Wänerstrand

Crystal Keep Rulings Summaries

• Does not prevent a creature from untapping during the upkeep step. It just stops the "normal" untap during the untap step. [D'Angelo 1999/08/01]
• Affects the next untap of that creature for whoever controls it at that time. In other words, the effect does not remember the current controller. [bethmo 1996/11/27]

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard
Printings (3/9)	Fifth Edition (Rare) Chronicles (Rare) The Dark (Rare)