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Beast switch
wizard attack 1

At-Will ✦ arcane, implement, psychic, transmutation

Target: One creature

Attack: Intelligence vs Fortitude

Hit: 1d8 + Intelligence modifier psychic damage. You knock the target prone and can slide it 1 square. The target cannot make opportunity attacks until the end of your next turn. (Level 21: 2d8 + Intelligence modifier psychic damage.)

Beast Switch is a wizard at-will power. It damaged the target while knocking it prone and sliding it 1 square, then preventing opportunity attacks from it. Beast Switch can be chosen as a level 1 power by wizards. [HotF:91]