Artificial Somnambulism
Replay Surface to improve star rewards
Improve Surface stars on an already cleared stage to raise weekly reward progress.
Artificial Somnambulism > Surface > a cleared dream stage with an unmet star condition.
Repeat whenever you want to improve permanent Surface stars. Weekly rewards are limited to their collection cycle, though stage replay remains available.
Stop once the desired weekly star tier is reached or remaining objectives exceed current team capability; resume after roster upgrades or the next reward cycle.
Open a guide to find other locations and see what the item is used for.
Improve Surface stars on an already cleared stage to raise weekly reward progress.