From publisher blurb: Advantageous Abilities provides Game Masters a toolkit with which they can easily add feature abilities to monsters and NPCs, giving their NPCs an advantageous edge (or just a little role-playing fun). Each product in this line has more than 15 themed feature abilities, and instructions that allow GMs to easily customize existing creatures or create all new foes. (Not So) Advantageous Abilities features twenty abilities for GMs to give their NPCs a custom Achilles’ heel. Making the most of this weakness can add flavour and fun to a campaign, creating a memorable nemesis and a little role-playing fun. Keep your PCs guessing with abilities like Squirely, have them laughing with Wheezer, or get them groaning with Flatulently Foul. No matter your choice, this PDF is sure to make flavourful and (not-so) effective NPCs. This product was released for April Fool's Day 2017.