Balagarn's Iron Horn

Spell level : Innate level: 2, Bard: 1, Sorcerer/Wizard: 2
Descriptor(s) : Sonic
Components : Verbal and Somatic
Range : Cone, 20 ft.
Target/Area : Spell Cone
Duration : Instantaneous
Save : Special, see text
Spell resistance : Yes

You create a deep, resonant vibration that shakes all creatures in the area of effect and knocks them off their feet if they fail an opposed Strength check (the spell has an effective Strength of 20).

Creatures that fail the check are knocked prone for one round. Bards casting this spell gain a bonus of 3 per Epic Relevel to the effective strength of the spell.