Inspect the available Arcanism node
The town station opens a tree labelled Arcanism. Select Onsen Room and read its effect and both cost icons before spending. The described effect adds a healing onsen before the boss room. This recorded account already has neighboring nodes; it does not show the full prerequisite unlock chain from a new save.
Check what the purchase leaves you
The wallet shows 4,031 gold and 31 material before purchase. Paying the displayed cost leaves 31 gold and 27 material. That is a useful budget check if you also want a weapon upgrade: this particular purchase nearly empties the gold balance. The subtraction describes this transaction, not a claim that the onsen always outranks equipment.
| Resource | Before | Cost | After |
|---|---|---|---|
| Gold | 4,031 | 4,000 | 31 |
| Pictured material | 31 | 4 | 27 |
Hold Craft and verify the purchased state
Use the Craft (Hold) prompt while the node is selected. After the payment animation, Onsen Room reads Max and its route connection is lit. Wait for the wallet animation to settle before checking the totals; intermediate rolling numbers are not additional charges.
- Select Onsen Room in Arcanism.
- Check the cost against both available balances.
- Hold the displayed Craft control.
- Confirm Max and the settled balances before leaving.
Use the pool before the boss
In the subsequent Kalina run, Will reaches a blue pool between two stairways before entering The Herald arena. Move into the pool and watch the health display. The recorded health rises from 6 before entry to 36 while inside; Will then leaves the pool and continues upstairs. This demonstrates 30 health restored in that visit. It does not establish an unlimited refill, a fixed percentage or restoration to full health.
Judge the outcome separately from the price
The same run later defeats The Herald, but the player finishes with 5 health. The footage establishes purchase, use and a successful later encounter; it does not isolate the onsen as the sole reason for winning. Compare the room’s recovery benefit with your own available weapon or armor choices rather than treating this one run as a universal investment order.