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Grasping claws
druid attack 1

Special: Grasping claws can be used as a melee basic attack.

Target: one creature

Attack: Wisdom vs. Reflex

Hit: "1d8 + Wisdom modifier damage, and the target is slowed until the end of your next turn.
"Level 21: 2d8 + Wisdom modifier damage."[PH2:85]

Grasping claws is an at-will power available to druids at 1st level.