Brechachun Brechun Brechachun

While chanting the phrase ‘Brechachun Brechun Brechachun’ the caster can concentrate on a 15 ft by 15 ft square and alter the laws of physics within that area to whatever the caster desires. (E.g. Stopping the party in midair to avoid fall damage) If the caster is attacked while casting, they have to succeed a DC 16 CON save to maintain concentration, otherwise roll a D4 to determine the outcome: 

1: All creatures within the targeted area are knocked prone and are unable to move for 2 rounds

2: All creatures within the targeted area are forced to move erratically and randomly for 1 round

3: The caster loses the ability to cast any spell from a school of magic that starts with an E

4: Nothing Happens