Mark of the Bruth’ra

You gain a natural Intelligence of 18. Once per day you can lower your intelligence Score to 3 and double your strength score (to maximum of 40). Due to this you will have disadvantage on all skill checks except for Strength checks. You are unintelligible, cannot understand languages, cannot read, and live by your base instincts while your intelligence is 3. Your natural abilities all still work while in this state and you understand friend from foe. This lasts until you have a short rest.