The Bag of Beans states:
[…] 81-90: A nest of 1d4 + 3 eggs springs up. Any creature that eats an egg must make a DC 20 Constitution saving throw. On a successful save, a creature permanently increases its lowest ability score by 1, randomly choosing among equally low scores. On a failed save, the creature takes 10d6 force damage from an internal magical explosion. […]
Interestingly, this item does not a list a cap on the increase like nearly every other item:
- Star card of the Deck of Many Things:
Increase one of your ability scores by 2. The score can exceed 20 but can’t exceed 24.
- Ioun Stone of Agility:
Your Dexterity score increases by 2, to a maximum of 20 […]
Even Ability Score Increases and similar features clauses under “Class features and Hit Dice” and also under “Ability Score and Modifiers”:
[…] You can’t increase an ability score above 20. […]
[…] Adventurers can have scores as high as 20 […]
There are also a multitude of “half-feats” which include lines like the following:
Increase your Charisma score by 1, to a maximum of 20.
Meanwhile there are other items that explicitly increase the maximum of 20 such as the Manual of Gainful Exercise:
[…] your Strength score increases by 2, as does your maximum for that score.
The Bag of Beans does not list a maximum score from its ability score increases; does this mean it does not have one?
If the inherent maximum is actually 20, does that mean that things like the Ioun Stone of Agility and various half-feats did not have to include “to a maximum of 20” in their descriptions?
Some related questions:
- Does changing race allow for the increase of ability scores beyond 20?
- Can you ever use an ASI to increase an Ability Score above 20?