Simpleton's Luck

Can only be used by a character with chaotic alignment. If Character becomes neutral or lawful, the feat is lost.  

By using a bonus action on your turn you can choose one creature other than yourself within 60 ft of you who can hear you to make the creature prone to accidents. That creature gains a die of Simpleton Luck, a d6 (d8 at 5th level, d10 at 10th level, and d12 at 15th level).

Once within the next 10 minutes, the creature will make a mistake (trip, misspeak, forget something) that ends up working in their benefit. Players can roll the die and add the number rolled to one ability check, attack roll, or saving throw it makes. The player can wait until after they have rolled the D20 to decide if they wish to use their Simpleton's Luck, but must decide before the DM say weather it succeeds or fails. Once rolled it is lost and a creature can only have one Simpleton's Luck at a time) 

If the creature has an unspent Simpleton's Luck and rolls a natural one they may spend it to have a Happy Accident. What ever they are attempting still fails critically, but due the nature of the failure some other good must come of it as determined by the DM.