This is an implant perk, which means that it is not gained through the level up system. One can get it from Doctor Usanagi at the New Vegas medical clinic for 4000 caps. It is designed to aid the general Luck of the person it's installed in by quickly calculating the chances of situations, allowing the user to make better choices in any situation.
- Adds +1 to Luck.
Behind the scenes
In the perk icon, Vault Boy is holding an Ace-high Straight Flush, better known as a 'Royal Flush', the highest-ranking hand in Poker. The odds of getting a Royal Flush in five-card stud-style poker are 0.000001539% or 649,740-to-1.