The screaming voices from the abyss try to guide you along your path. "Try".

Roll a D20. If the number is even, you gain advantage on your next attack or saving throw. If the number is odd, you gain disadvantage on your next attack or saving throw.

You, at times, will hear the voices outside of times you need them. Your DM may choose for them to reveal secret (or false) information, or may have them make normal conversation.

"The voices... they won't ******* shut up!" - Kalasar Morvenair