Advance through a featured boss’s difficulty levels to earn the Letter rewards tied to first-time clears.
Mobile / Global English
WHERE & HOW TO FARM
Where to farm
Dream Realm > featured boss > difficulty selection and first-clear reward panel.
Dream Realm rewards two different goals: improving a boss result for damage or ranking, and clearing a difficulty for the first time. This route targets first-clear Letters. Work upward through the difficulties available for the current boss, using each newly unlocked level as a progression step. Letters come from a first clear, so repeating a difficulty you have already beaten is not a substitute for advancing.
A featured boss with an uncleared difficulty available.
A team you can adjust to the boss’s displayed encounter details.
Open Dream Realm and select the currently featured boss.
Review the difficulty list and identify the next level marked as uncleared or offering a first-clear reward.
Check that level’s encounter details and the reward panel before entering.
Choose a team and formation suited to the displayed fight; prioritize keeping the team active through the encounter.
Start the selected difficulty and complete the battle.
Confirm the clear registered, then collect the Letter reward shown for that first clear.
If the next difficulty is available, inspect its details and attempt it with any needed team changes.
When progress stalls, return to a previously cleared difficulty only if you are pursuing its separate damage or ranking rewards.
Farming tips
Advance one difficulty at a time so you can identify where the encounter becomes a roster or formation check.
Verify that a level is new and its Letter reward is available before spending an attempt; a repeat clear serves a different goal.
Repeat, collect and use
The Letter route is limited to first clears of eligible difficulties. Continue while new difficulty levels and their first-clear rewards remain available for the featured boss; repeated clears do not provide another first-clear Letter.
Common mistakes
Repeating a cleared difficulty expecting another Letter; select an uncleared level for first-clear progression.
Jumping to a harder fight without checking its encounter details; adjust the team to the listed demands first.
Leaving the reward panel without claiming a completed clear’s Letter; return to the boss rewards and collect it.
When to stop or switch
Stop when you have claimed the Letters for all difficulties currently available to your account, or when the next uncleared level is beyond your team’s current capability; return after strengthening the roster or when more difficulty progression becomes available.
