Even after finishing all the main quests, the players may still find themselves not reaching the highest level of ability bonus (like the maximum of Attack Multiplier should be 60%, but the players find themselves are 55%) when using the Introspection Dream. This is because the number of Slugs they eat is less than 20. As the former quests that asking for eating enough slugs will decrease the number by 20 after finishing them, while there is no hint after all of them, it is very likely for the players to not aware of that and confuse about their bonus problem.
It may be better to adjust the mechanism.