Grasping shards
invoker attack 1
Target: each creature within this power's area of effect
Attack: Wisdom vs. Fortitude
Hit: "Wisdom modifier radiant damage, and the target is slowed until the end of your next turn.
"Level 21: 1d10 + Wisdom modifier radiant damage."[PH2:103]
Grasping shards is an at-will power available to invokers at 1st level.