Power Credits and Nth Metal are the two currencies that run every decision in Injustice: Gods Among Us Mobile. Every character level, gear upgrade, promotion, and pack purchase draws from one or both. Managing them well is not about hoarding — it is about spending on targets that are large enough to matter and spaced far enough apart that you do not waste the income in between.
This guide covers the practical limits of each currency, the spending rules that prevent cap-related waste, and the management habits that keep your account liquid without holding dead weight.
What the cap actually is
Injustice: Gods Among Us Mobile does not publish hard caps for Power Credits or Nth Metal. The game will not display a warning when you approach a threshold, and it will not stop you from earning more. That does not mean there is no limit — it means the limit is practical, not displayed.
The practical Power Credits cap is the point where your credit balance exceeds the sum of your next three named targets. If you know you need 40,000 for a gear slot, 50,000 for a character level, and 65,000 for a gear locker pull, anything beyond 155,000 is exposed to impulse spending. The game will not stop you from buying a Bronze character because you have too many credits. You will stop yourself, and usually badly.
The practical Nth Metal cap is lower relative to income. Nth Metal comes from Phantom Zone runs, Survivor Mode wheels, and Online Battle season rewards. A Phantom Zone event with all Elite crystals and two resets yields roughly 462.5 Nth Metal on average. If you are holding more than that without a specific purchase target, you are holding idle currency that could have been spent on something defined.
Neither currency has a published maximum. Both have practical ceilings based on your account's next move.
Power Credits: the soft cap problem
Power Credits are the soft currency, and they are consumed by almost everything. The problem is not running out — it is spending them so badly that you run out of useful things to buy while still holding a large balance.
Where Power Credits go
Character levelling — Each level costs more than the last, and the curve steepens after level 50. A single character from level 1 to level 50 costs roughly 250,000 credits. Promoting a Gold character to Elite III costs 250,000 credits plus 250,000 in promotion costs.
Gear slots — 20,000 for the second slot, 40,000 for the third, per character. If you are building a team of three, that is 180,000 credits for full gear access across the roster.
Gear fusing and evolving — Fusing gear to threshold costs credits and shards. Evolving an Epic to Legendary costs credits and shards. The exact numbers depend on the piece, but the principle is consistent: gear is the second budget, and it competes with character levelling for the same pool.
Store purchases — Characters, support cards, booster packs. The cheapest Gold character costs 130,000 credits. A support card costs between 15,000 and 50,000.
The spending rhythm that works
Accumulate to a specific target, then spend. Do not spend on anything that does not advance a target you have already named.
The target should be specific: "I need 40,000 for a gear slot on Flashpoint Batman" or "I need 50,000 to finish Deathstroke's level cap." If the target is "I might need credits for something later," the credits will be spent on something worse.
The Injustice power credits guide covers the arithmetic of credit income and the efficiency of Bonus Battle 6 and Bonus Battle 8. The short version: Bonus Battle 6 is the standard farm because it is easier, but Bonus Battle 8 yields more credits per energy if you can clear it.
The cap warning signs
You are approaching the practical cap when:
- You have more than 300,000 credits and no specific target named.
- You are buying Bronze characters because they are cheap, not because your team needs them.
- You are opening the Gear Locker because you have nothing else to spend on.
- You are fusing gear pieces randomly because you have the credits and the shards appeared.
Any of these is a signal to name a target before spending another credit.
Nth Metal: the premium cap problem
Nth Metal is the premium currency, and it is consumed by promotions, packs, and rerolls. The cap problem is different from Power Credits because the income is slower and the purchases are more expensive.
Where Nth Metal goes
Metal character promotions — Evolving a Metal character from Elite III costs 250 Nth Metal and 250,000 Power Credits. Promoting it through the ranks costs additional copies and additional Nth Metal at each tier.
Nth Metal packs — The Pro Pack costs 400 Nth Metal. The Ultimate Pack costs 800. Both contain characters and gear, but the cost per character is high if you are hunting for a specific pull.
Phantom Zone rerolls — The first reroll is free. Subsequent rerolls cost 5 Nth Metal on Elite difficulty. This is the most common source of accidental Nth Metal drain because the cost per reroll is low enough to feel free, but the cumulative cost is high.
Phantom Zone resets — 50 Nth Metal resets the event after completion, up to twice per event. If you are farming Elite crystals, this is worth it. If you are rerolling conditions you cannot beat, it is wasted.
The spending rhythm that works
Nth Metal should be spent on targets that are worth the premium. The two categories worth spending on are:
- Specific promotions — A Metal character you intend to build to Elite III is worth the 250 Nth Metal evolution cost because the character stays with your roster permanently.
- Full packs with a target — Saving 800 Nth Metal for an Ultimate Pack is better than spending 200 on three Pro Packs, because the cost per character is lower and the Ultimate Pack has better odds.
Do not spend Nth Metal on rerolls unless the reroll changes a condition you cannot otherwise meet. The Fandom wiki notes that rerolls are not recommended because Nth Metal is very valuable.
The cap warning signs
You are approaching the practical Nth Metal cap when:
- You have more than 800 Nth Metal and no pack or promotion target named.
- You are rerolling Phantom Zone conditions because you are impatient, not because the current condition is impossible.
- You are buying Pro Packs with no target character in mind.
- You are spending Nth Metal on anything that does not permanently add to your roster.
The relationship between the two currencies
Power Credits and Nth Metal are not independent. They are two sides of the same budget. A character promotion costs both: the duplicate copies cost credits to level and fuse, and the promotion itself costs Nth Metal. A gear evolution costs credits for fusing and Nth Metal for the evolution step.
The mistake is managing them separately when they are spent together. If you have 500,000 credits and 100 Nth Metal, you are not rich — you are two-thirds of the way through a promotion you cannot finish.
The useful mental model is: treat every major purchase as a combined cost in both currencies, and do not start it unless you have both sides covered.
Safe management rules
Rule 1: Name the target before you earn the currency
Do not grind credits or Nth Metal until you have a specific purchase in mind. The grind should be the last step, not the first. If you do not know what you are saving for, you will spend it on whatever looks good when it arrives.
Rule 2: Keep a named reserve
For Power Credits, keep enough to cover your next two named targets. For Nth Metal, keep enough to cover your next one named target. Everything beyond the reserve is available for new opportunities.
Rule 3: Spend the reserve only on the target it was named for
If you named the reserve for a gear slot, do not spend it on a character level. If you named it for a promotion, do not spend it on a pack. The reserve is earmarked. Moving it is a decision, not an accident.
Rule 4: Do not hoard past the point of diminishing returns
Holding 2 million credits when your next target is 200,000 is not safety — it is waste. The game will not give you interest. Events will not pay dividends. The credits will sit there while you miss the character or gear piece that would have moved your roster forward.
Rule 5: Convert excess into something that cannot be capped
The only things that do not have practical caps are character copies and gear shards. If you have excess credits and no specific purchase, convert them into XP augments, support card dupes, or gear shards through the Injustice shop. These are functional even when you cannot immediately use them.
The safety question
Currency management and account modification are separate topics, but they intersect when you are considering a service that adds credits or Nth Metal to your account.
The honest version: adding currency to an existing account is account modification, and account modification carries risk regardless of how it is done. Injustice mods are account-side services that apply changes without installing anything on your device, but they are not risk-free. The goal is risk reduction, not elimination.
If you decide to use a currency service, the management rules above still apply. The currency is real, the cap problem is real, and spending it badly still wastes it. A large injection of credits without a target produces the same outcome as grinding them yourself without a target: expensive mistakes.
The short version
- There is no published hard cap, but practical caps exist based on your next named targets.
- Power Credits are the soft currency — manage them by naming targets before you earn.
- Nth Metal is the premium currency — manage it by spending only on promotions or full packs with a defined goal.
- Treat both currencies as one budget, because major purchases cost both.
- Convert excess credits into shards and dupes rather than hoarding past diminishing returns.
- If you use a currency service, apply the same management rules — large balances without targets are still wasted.
Where to go next
- Injustice Power Credits — the arithmetic of credit income and the most efficient farms
- Injustice Nth Metal — when to spend premium currency and when to wait
- Injustice shop guide — how to spend currency on the right targets
- Injustice daily routine guide — what a session should accomplish before you spend
- How Injustice mods work — the process and risk if you are considering a currency service