Your artifact inventory and champion vault are the two places that fill up fastest, especially after event and tournament marathons. Both can be expanded with gems, but gems are a scarce resource and shouldn't be dumped in blind. Here's how the slot system works, where the expansion button lives, and when the purchase is actually worth it.
What the "storage" actually consists of
RAID has two separate caps. The first is the artifact inventory: weapons, helmets, shields, gauntlets, boots, chests and accessories (rings, amulets, banners) all land here. This is the counter that hits the ceiling most often, because gear drops from every single run. The second is the champion vault: a separate holding area for champions you don't need in the active roster but don't want to throw away — fusion fodder, duplicates for skill upgrades, niche picks.
Both expand with gems in steps of 10 slots, and both have a hard cap you cannot pass. The starting artifact limit is around a hundred slots and the champion vault is noticeably smaller; exact numbers depend on the client version and purchases you've already made. Bought slots are permanent — this is a one-time investment, not a rental.
How to expand: where the button is
- Open the Inventory screen (artifacts) or the Vault (champions).
- Find the expansion button — a plus next to the slot counter or a dedicated "+" icon in the corner.
- The game shows the gem price for the next 10 slots — confirm the purchase.
- Make sure you can afford it: gems are deducted immediately and there's no refund.
The price isn't fixed: every next step costs more than the previous one. Early expansions are relatively cheap — tens of gems — while later ones climb into the hundreds. So there's no point racing to the maximum "just in case": it's better to buy 10–20 slots when the cap genuinely gets in your way.
When it's worth it — and when it's a waste
Expanding makes sense if you farm heavily: running events, tournaments and dungeons, and keeping two or three gear sets on key champions for different modes — Clan Boss, Arena, dungeons. It also makes sense when you're building sets piece by piece and don't want to sell good rolls just because of space.
The opposite case: the counter is capped because you aren't selling junk. In that situation, expansion is paying for the right to hoard. Clean the inventory first, then spend gems. A workable rule: if after a full cleanup you still have fewer than ten free slots, that's your signal to expand.
Free cleanup: gear triage rules
The fastest way to free space is a filtered mass sale. Open the sell screen, set filters by rarity and stars, lock everything valuable in advance, then sell the rest. Locks don't take up slots but they protect good pieces from the next cleanup.
| Gear | Keep | Sell |
|---|---|---|
| Common and Uncommon, any level | — | always |
| Rare, 5★ and below | only perfect substats for a specific champion | everything else |
| Epic, 5★ | Speed, Accuracy, Crit Rate sets | no Speed, no Accuracy |
| Epic 6★, Legendary 5–6★ | almost always, if substats aren't trash | duplicates with bad substats |
Then go through accessories separately: rings and amulets without the main stat that matches a champion's role (Attack for nukers, HP/Defence for tanks, Accuracy for debuffers) are dead weight.
What not to hoard "for later"
- Low-star gear. By the time you need it, you'll already be farming 6★.
- Set duplicates. Five identical Speed boots only matter if you have five champions for them.
- Gear "for a champion you don't have yet". Understandable, but those champions pile up faster than the gear ever gets used.
- Junk duplicate champions. Keep only fusion fodder and skill-up material for key champions. Don't feed your starters — Kael, Athel, Elhain and Galek all stay useful.
What else your gems compete with
Gems are the universal currency, and expansion has strong rivals: energy refills (around 40 gems for a full bar) are the most frequent and most valuable spend early and mid-game; a full mastery set bought with gems for a key champion; shards and event offers. Storage expansion doesn't make your roster stronger — it's pure quality of life.
A practical approach: keep a small gem reserve for events and expand out of the surplus. That way you're never stuck unable to afford something you need because you bought ten extra slots for junk gauntlets.
Summary
Inventory and vault expansions are permanent purchases in steps of 10 slots, paid in gems, with a price that rises every step. Clean your storage for free first: sell low rarities and low stars, lock the good pieces, and go through accessories. Expand when space still runs out after a cleanup, and don't chase the maximum — top up a little from spare gems without sacrificing energy or masteries.
24/09/2026