Description
| Set: | Kaladesh Inventions | 
| Type: | Artifact | 
| Rarity: | Mythic | 
| Cost: | {1} | 
            Creatures with power 3 or greater don't untap during their controllers' untap steps.
        
        
            "When it oscillated above a particular frequency, the stone induced acute listlessness in several researchers."
—Consulate engineer's log
        
                
              
              



