Timestill Mirror is a mirror that was believed to have been used by the Dreadwyrm side during the Void War. It stops time for any observer, giving them an unlimited amount of time in a dreamlike, lucid state, while no time passes for onlookers.
Timestill Mirror is an exceptionally useful relic, in that it allows the formulation of arbitrarily complicated strategies in literally an instant. For example, if one were faced with a difficult choice, and looked into the mirror, one could fully live out the consequences of both choices before committing to one, after only an apparent glance at the mirror.
The mirror is not without risk, though. It is entirely possible, and in fact quite common, for a user of the mirror to become trapped in imagined fantasies, and become unwilling to look away. The instant one is no longer willing to look away from the mirror, their soul is extinguished from their body, and their heart stops. For an outside observer, it would appear as though the individual simply died the instant they looked at the mirror.
Cae Lawrence - Used this mirror to great effect during the events of Crosslink
Frost Lawrence - The creator of the mirror, and the sole individual able to physically enter the mirror.
Rimas Nolie - Frequently used the mirror after the events of Crosslink while drafting treatises on various types of magic.