Devilish Sight

When the player takes this feat, they gain proficiency in perception (or expertise if you already are proficient) and the ability to roll two d20 instead of one when they make a perception check once a day, taking the highest number. If both dice fail, they may re-roll one of the dice, but gain disadvantage on perception checks until they take a short rest or gain an exhaustion level. If the player succeeds in both rolls, they gain +2 on initiative and are immune to being ambushed for an hour. This has a cool-down of one long rest or two short rests, and they gain an exhaustion level on use