Alastor´s pulse of weirdness

You send a shockwave of wild magic that alter reality. Each creature in the 15 ft cone must make a Dexterity saving throw or be pushed back 10ft. Creatures in this area also suffer from one random effect (1d4):

1 All creatures must make a saving throw as if you have cast polymorph on them. If they fail they will be turned into chickens until the end of their next turn.

2 All creatures must make a saving throw as if you have cast fireball on them. 

3 All creatures become invisible until the end of their next turn.

4 All creatures are surrounded by booming music and must shout whenever they speak for one day or until the effect is dispelled.