Lifeweb is one of the thirteen primary Arcanoi from Wraith: The Oblivion. Wraiths who know Lifeweb can use it to strengthen, weaken, or watch over Fetters. Even though the Monitors' powers revolve around only one aspect of a wraith’s existence, they are surprisingly flexible. Not only can Monitors monitor their own Fetters, but they can examine those of other wraiths at will. Ties to Fetters can be severed, created, strengthened, or weakened. Monitors do not have an ability to directly fight or damage another wraith, but can be potent foes nonetheless.