Arithmetic Shell
Description
A material used for Resonator Ascension.
Background
For most Roya, their first encounter with "calculation" in childhood wasn't a numeration table from Startorch Academy, but the cross-section of an ancient seashell. These fossilized shells, known as Arithmetic Shells, have natural interiors etched into concentric grooves, like a mathematical grid carved by the hands of the divine. Elders would teach children to drop small stones of varying colors and shapes—or tiny sticks—into the grooves, mimicking the processes of addition, subtraction, multiplication, division, distribution, and pairing…
Where to get it
Supply Pack · Collection Spots · Overworld Collection · Resonator Nursing Unit
Max stack size
999
Characters that need this
Similar materials
Materials→
Characters→
Tools · Wiki · Redeem codes · Banner & event schedule · Characters · Tier List
How long until it respawns? The full reset schedule
- Daily reset at 04:00 server time — the daily quest, activity points, and the monthly pass's daily payout.
- Plants, ore nodes and ordinary field enemies come back on the daily reset. Clearing an area today means it is full again tomorrow — no multi-day wait.
- Field bosses and weekly bosses respawn about 2 minutes after you defeat them. You do NOT need to leave the area or teleport away and back — simply wait there and the boss returns.
- Special red-aura enemies take far longer: 72 hours counted from the exact moment you killed them, not from the daily rollover.
- Weekly reset every Monday at 04:00 — weekly boss reward claims and the season pass's weekly missions.
- Weekly bosses only pay out 3 claims per week, and those 3 are shared across every weekly boss — three different bosses once each uses them up just as fast as one boss three times. You can still fight them afterwards; there is simply no reward.
04:00 follows the time zone of the server you play on, not your device clock.