Assassin Utility 6Darkness
A cloud of pure shadow expands from you, shrouding the area in darkness.
Daily Shadow, Zone
Minor Action Close burst 2
Effect: The burst creates a zone that lasts until the end of your next turn. To creatures other than you, the zone is totally obscured and blocks line of sight.
Sustain Minor: The zone persists until the end of your next turn. You must be in the zone to sustain it.
Published in Heroes of Shadow, page(s) 25.