You open yourself to a moment of reckless carnage, tearing a barely-contained wound through reality’s surface and exposing realspace to the hellish depredations of the Warp. Choose a Zone within Medium Range. Until the start of your next turn, the Zone becomes Difficult Terrain, Warp-Touched, and a Deadly Hazard. Additionally, when a creature takes Damage from this power, it must win a Very Hard (−30) Discipline (Psychic) Test Opposing your Manifest Test or be Stunned.
When you stop sustaining this power, roll 1d10. If the result is greater than or equal to your Willpower Bonus, you stop sustaining it, but the vortex remains, and its effects still apply to its Zone. The vortex remains open until a Psyker within Medium Range uses an Action to attempt to close the rift, requiring a successful Very Hard (−30) Psychic Mastery (Telekinesis) Test.