SPOILERS ABOUT SCROLL OF INSIGHT AHEAD
For anyone curious, the Scroll of Insight you can purchase for 3000 gold in Horace's Clone Shop highlights enemy weaknesses as long as all four are known, even in badass mode that normally hides them
I tested battles with each number of scrolls, and from what I can understand, they are:
| Equipped | Granted Perk |
| 1 scroll | Reveals opponent's weakness in Badass mode, if you already knew it in Normal. |
| 2 scrolls | Reveals opponent's weakness in Badass mode, without needing to know prior. |
| 3 scrolls | Reveals cursed opponent's weakness in Badass mode. |
Also, if you equip 2 or 3 scrolls, your battle-moves get color-coded to show their effectiveness:
| Color | Meaning |
| Grey | Opponent hates it. |
| Green | Opponent likes it a little. |
| Yellow | Opponent likes it a lot. |
| Red | Opponent's weakness. (Red is only shown with 3 scrolls equipped, otherwise it's colored Yellow.) |
Here's an example with 3 scrolls equipped:
