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Sun strike
invoker attack 1

Special: Sun strike can be used as a ranged basic attack.

Target: one creature

Attack: Wisdom vs. Reflex

Hit: "1d8 + Wisdom modifier radiant damage, and you slide the target 1 square.
"Level 21: 2d8 + Wisdom modifier radiant damage."[PH2:103]

Sun strike is an at-will power available to invokers at 1st level.