Exists Partially In The Umbra Tier 4

Tier 4: Ghost (4 Intellect points). For the next ten minutes, you are trained in sneaking tasks. During this time, you can move through solid barriers (but not magical barriers) at a rate of 1 foot (30 cm) per round, and you can perceive while phased within a barrier or object, which allows you to peek through walls. Action to initiate.