1- By killing any monster in the game, it will have a chance to drop a letter out of seven letters: C, O, N, Q, U, E, and R.
2- After collecting the 7 letters, you can bet with them by interacting with ConquerLetters NPC (287,302) in Twin City to enter LetterThiefs Den where you have to kill a LetterThief, which you can find it around (200,210).
3- After killing a LetterThief, the 7 letters will be stolen from you, and you will have a 75% chance to return back with nothing, and a 25% chance to return back with a Zeus shield.
If you have enough amount of Zeus shields, you can swap them for rewards at ConquerLetters NPC (287,302) in Twin City, as shown in the image.
- The quest shop gets refreshed daily.
- In LetterThiefs Den, storing any letter into a warehouse/sash will get you kicked out of the map, but the letters won't be taken from you.
- Letters or Zeus shields cannot be traded, and dropping one of them will make it disappear.