Unleash (Cult of Rakdos)

"The mask isn't meant to hide his identity. It's meant to keep the viscera out of his eyes." 

The intoxicating hype and vibes of the Cult have enabled you to unlock a new inner strength and completely Unleash yourself!

Whenever you roll initiative, you choose whether to Unleash or not. When Unleashed, all damage that you deal is doubled. Additionally, all damage that you are dealt is doubled. If you choose to Unleash, you are Unleashed for the entire combat. 

You can use this feature a number of times equal to 1/2 of your proficiency bonus, rounded up, and all expended uses are restored with a long rest.