A microfeat usable in nearly any d20-based game.
Some people will love this feat. Some will hate it. There will be disagreements if it is overpowered, or underpowered, or a feat tax, or shows a quantitative misunderstanding of how any particular d20 game works.
Which is funny, given that a feat in a blog that doesn’t even tie itself to a specific game system is about as unofficial as you can get.
Sometimes, things just go your way.
Benefit: Once per game session when you make a d20 roll, after seeing the result, you may immediately decide to instead have the d20 result be treated as a natural 20 (as if the die roll had shown a 20).
Some people will love this Patreon. Some will hate it. There will be disagreements if it is a great value, or a terrible value, or shows a quantitative misunderstanding of how crowdfunding works.