You stomp your foot or strike your weapon against the ground or floor, creating a ripple of power that you can use to trip a Creature. You can target multiple creatures with this spell, including creatures more than one size category larger than you.Attempt the Combat Maneuver check to trip the targets, but instead of your base Attack Bonus you can use your Caster Level, and instead of your Strength modifier you can use your Spellcasting Ability Score modifier (Intelligence for magi and wizards; Wisdom for druids and rangers; Charisma for bloodragers and sorcerers). When you attempt the Combat Maneuver check, apply its result to each Creature within the area. This trip attempt does not provoke an attack of opportunity. This spell has no effect if you cannot reach the ground or floor, or if your target is not in contact with the ground or floor.