Sudden Slue 2014
4th-level conjuration
With a growl, you call forth dozens of bears to overrun all creatures in a 20-foot cube within range. Each creature in the area must make a Dexterity saving throw. On a failed save, a creature takes 6d6 bludgeoning damage and is knocked prone. On a successful save, a creature takes half the damage and isn't knocked prone. The bears disappear after making their charge.
Source: Tome of Heroes (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details