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Astral wind
invoker attack 1

Target: each creature within this power's area of effect

Attack: Wisdom vs. Fortitude

Hit: "1d6 + Wisdom modifier damage, and you push the target 1 square. If the target moves nearer to you on its next turn, it takes extra damage equal to your Constitution modifier.
"Level 21: 2d6 + Wisdom modifier damage."[PHH2:DH3]

Astral wind is an at-will power available to invokers at 1st level.