Beast switch
wizard attack 1

Target: One creature

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]