Darksiders Wiki

Death with Phasewalker equipped

Time, like sin, may be undone.
Lilith, enhancing Death's Voidwalker

An enhanced version of the Voidwalker. This item can now tear a void in the present and the past, allowing for time travel.

The Phasewalker is given to Death by Lilith, allowing him to explore The Black Stone in a time before it fell to the Corruption, following Samael's disappearance.

Even though it's enhanced, Phasewalker can still function as the Voidwalker, allowing Death to create and traverse through normal portals.