Your enemies shriek in terror as, at least in their mind's eye, a bottomless pit opens beneath their feet.
Target: each enemy within the burst
Attack: Intelligence vs. Will
Hit: 2d6 + Intelligence modifier psychic damage, and the target falls prone. The target is immobilized until the end of its next turn.
Miss: Half damage, and the target falls prone.
Effect: The burst creates a zone that lasts until the end of the encounter. Any enemy that enters the zone falls prone.
Phantom chasm is a 1st-level wizard daily attack power. Each enemy hit by phantom chasm takes psychic damage, falls prone, and becomes immobilized through its next turn. On a miss, phantom chasm still deals half damage and makes an enemy fall prone. In addition, phantom chasm creates a zone until the end of the encounter; enemies entering the zone fall prone.[AP:103][HotFL:208]