Cheapest priced copy (Fifth Edition): $0.35 at Card Kingdom, near mint, their price list as of .
Labyrinth Minotaur 
Creature — Minotaur · 1/4 · Common · Fifth Edition · #97
Whenever this creature blocks a creature, that creature doesn't untap during its controller's next untap step.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
3 printings · $0.35 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Fifth Edition | 97 | Common | $0.35 | — |
| Homelands | 30a | Common | $0.35 | — |
| Homelands | 30b | Common | $0.35 | — |
2 rulings from Wizards of the Coast
- 1 October 2009Labyrinth Minotaur doesn’t track the creature’s controller. If the affected creature changes controllers before its old controller’s next untap step, this ability will prevent it from being untapped during its new controller’s next untap step.
- 1 October 2009If the creature Labyrinth Minotaur blocked is untapped at the time its controller’s next untap step begins, this ability has no effect. It won’t apply at some later time when that creature is tapped.