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Storm Pillar
wizard attack 1

A crackling column of lightning appears amid your enemies, lashing out at any who move near it.

Effect: You conjure a pillar of crackling energy in an unoccupied square within range. The pillar occupies 1 square and lasts until the end of your next turn. Each enemy that moves into a square adjacent to the pillar on its turn takes 1d6 + your intelligence modifier lightning damage.
Level 21: 2d6 + Intelligence modifier lightning damage.

Storm Pillar is an at-will power available to wizards at 1st level.[AP:101]