Sentinels are automated protoss constructs, appearing as large, black cylinders which float above the ground. Designed as automated guards for settlements, sentinels are capable of cloaking independently. Upon identifying an enemy, a sentinel fires its laser. This is not its preferred method of attack however, instead moving into close quarters and wielding an array of psionic blades. To date, the only active sentinel encountered has been on Dylar IV, guarding the ruins of an ancient protoss settlement.