Timelock

Timelocks,  also known as time bolts, were a piece of ancient San 'Shyuum technology. Prehistoric humans placed a timelock on the Primordial's prison beneath Charum Hakkor's arena to prevent it from escaping. According to the Didact, this measure was almost as effective as Forerunner technology.

List of appearances

 * Halo: Cryptum
 * Halo: Primordium
 * Halo: Silentium