This Baldur's Gate 3 weapon uses the Civilization series' notorious 'Gandhi Math' to Uno-Reverse a Critical Fail

gamesradar.com:

A fortunate Baldur's Gate 3 theorycrafter has discovered that one of the RPG's weapons has the potential to turn a Critical Failure into a Critical Success, all by using the kind of glitchy math made famous by the Civilization series.

As highlighted in a post on Reddit, at the start of Baldur's Gate 3's second act you can purchase the Defender Greataxe from Quartermaster Talli at the Last Light Inn. It's a rare axe with a +2 enchantment, which means a +2 bonus to attack and damage rolls. It's also ideal for your tank thanks to an effect that allows you to sacrifice one point of that enchantment to increase your armor and saving throw bonus – you still get +1 to your attacks, but now you also get +1 to your defences.

The choice of whether or not to make the swap triggers on your first attack of each round of combat. But as the post on Reddit attests, you can roll a Critical Failure - a one on your D20 - and still choose to lower your Enchantment by one. Traditionally, you don't add modifiers to a Critical Failure or a Success - they're simply a 5% chance of an automatic win or lose situation. But an Enchantment isn't a modifier, so if you take one away from one, you're left with zero, a number that doesn't appear on any dice.

According to this player's findings, that means that "in Civ 1 Ghandi fashion, the counter rolls over to 20," immediately turning your Crit Fail into a Crit Success, with all the extra damage that comes from that.

In case you're not up on your 4X history, that's a reference to the Indian leader in 1991's Civilization, Mahatma Gandhi. A now-debunked legend claimed that all leaders had an inherent aggression score, and Gandhi, a known pacifist, had the lowest possible score - one. But once India formed