Obsidian Knight Ruby Spending Priorities

Category Currencies and SpendingUpdated 10/26/2026

★

この記事の結論

Sort Ruby purchases into four groups, then use your current wall, free alternatives, and remaining balance to choose without following a fixed tier list.

Answer four questions before spending

Does the benefit remain in future runs or after an equipment replacement?
Does it directly reduce the problem blocking progress now?
Can normal progression or a free reward achieve the same goal?
Will enough Rubies remain to compare the next necessary option?

If you cannot answer all four, save the balance until the effect is clear. “Permanent,” “expensive,” and “rare” do not establish priority on their own.

Put the purchase into one of four groups

Group	Examples discussed in public sources	Decision
Persistent capacity or automation	Potion slots and features that support repeated runs	Compare early if you will use the effect in many runs
Persistent Artifact effects	Unlocks that continue to affect combat or rewards	Match the effect to the current wall
Exchange for Skill Card resources	Growth for cards you already use	Choose the card and verify the current exchange first
One-time or uncertain purchases	Equipment chests and similar rewards	Compare persistent options and free routes first

This is not a complete shop list. Names, prices, locations, and exchange rates can change, so treat the current game screen as the source of truth.

Choose from the current progression problem

You die too early

First check equipment, level, and normal progression. If Potions run out or recovery repeatedly fails after those checks, compare a persistent Potion-capacity or survival effect that applies to future runs.

After buying, retry the same mode three times and compare the first failure point and Potions remaining.

The Skill Card build rarely forms

Separate upgrades for frequently used Skill Cards, persistent effects that support the start or choices, and unwanted-card control. Before exchanging Rubies for another resource, decide which card will receive the upgrade.

Improving a trigger and its connected payoff is easier to evaluate than spreading resources evenly across every card. See Skill Card selection.

Gold or equipment is missing

Before buying an equipment chest with Rubies, check normal sources through Story, PvP, Treasure Run, and shops. One-time equipment can be replaced. Do not compare it to a persistent Gold or progression effect as if both had the same lifetime.

You cannot decide what to buy

Save the currency and record the current candidates. Public discussions disagree on whether Artifacts, Skill upgrades, or saving for future updates should come next because the answer changes with account ownership and progression.

Early, mid, and late progression

Early: compare effects used in repeated runs

Equipment changes frequently early on, so compare capacity, Artifacts, and progression effects that carry into multiple runs before a one-time equipment reward. Do not pre-buy a feature that is not available or useful yet.

Mid: buy only for the current wall

As more modes unlock, check whether the purchase helps the mode that is currently blocked. An early Story death, a long Ship run, and a special Challenge condition do not necessarily need the same effect.

Late: compare remaining upgrades with saving

After major persistent options are owned, compare Skill Card resources, remaining persistent effects, and saving for future updates. Public sources do not establish one universal order. Use current ownership and current prices.

Why equipment chests are often delayed

Community advice repeatedly warns against spending Rubies on equipment chests because:

The reward is used once.
The contents may not fit the current build.
Normal progression and shops may replace the equipment.
The same currency can buy options that affect many runs.

This is not a game rule that forbids the purchase. Once persistent options are covered, and the contents, price, and purpose are understood, it can still be compared with other candidates.

Pre-purchase checklist

Question	Yes	No
Does the effect remain in future runs?	Keep as a priority candidate	Recheck the one-time value
Does it reduce the current failure?	Include it in a three-run test	Delay it
Is there no free or normal alternative?	Keep the candidate	Test the alternative first
Can you explain the trigger and use?	Check the current price	Save until it is clear
Will Rubies remain after buying?	Spend only the needed amount	Avoid emptying the balance

Check the result after buying

Record the Ruby balance and effect text before purchase.
Retry the same mode and difficulty three times.
Compare the metric tied to the goal: stage reached, Potions remaining, or card-chain completion.
If the symptom does not improve, diagnose the failure before buying more of the same type.

Spending currency is not the result. Measure which failure changed.

Values this guide does not fix

Item prices and exchange rates
One fixed order for Artifacts or persistent unlocks
Maximum Potion or equipment slot counts
Limited-time and future-update products
Paid-package value
One savings target for every player

If the current price, location, or effect differs, follow the current game display.