Combat and raids
Fortress rares
Tiered collectibles rolled once per cleared Fortress wave. Higher tiers unlock deeper into the run, and each owned piece is a permanent account bonus.
Rules and numbers
- dev note Every connected player rolls the pool each time a wave is cleared.Source: Constants.js:4733-4736
- confirmed Bands unlock at T1 wave 1, T2 21, T3 41, T4 61, T5 81, C 101 and C7 121, and stay active once unlocked.
GAUNTLET_RARE_TIER_START = {t1:1,t2:21,t3:41,t4:61,t5:81,c:101,c7:121}Source: Constants.js:4748 - inferred The rate ramps with waves into the band and plateaus 64 waves in. The likely form is base x min(waves into band, 64), but the server roller is not visible.
pPerBand = 0.0002381 * min(wave - bandStart + 1, 64) (assumed)Source: Constants.js:4736-4751 - confirmed There are 11 families (5 Beacons, Satchel, Chef's Spice, Trader's Notes, Corruptor's Idol, Hot Sauce, Enchanted Fortification): 11 items per band, 10 at C7 because the Fortification has no C7.Source: items.json (gauntletRareTier)
- confirmed Satchel adds +4 bag slots per tier (28 to 56), Chef's Spice +20% food heal per tier, Hot Sauce -0.25 s auto-eat cooldown per tier, and Corruptor's Idol +1% corruption per tier.Source: Constants.js:448-452, 4712-4714, 1512-1515, 4991-4994
- confirmed Beacons give +0.25% all-skill XP each, plus one stat per family: Haste -0.05 s x tier, Bounty +1% double gather, Thrift +0.5% save, Sure +1% success, Swift +0.5% move x tier.Source: Constants.js:4678-4711
- confirmed Trader's Notes add +2% to the favourable end of barter price rolls per tier, and the Enchanted Fortification is Fortify's tool on the combat XP curve (+1% to +5%).Source: Constants.js:4715-4720, 1981-1989
- confirmed The Constants and RaidModal comments still call the pool empty, but items.json has all 76 items tagged.Source: Constants.js:4742-4744; items.json
Connected systems
- Fortress rares improve (Trader's Notes) Barter
- Fortress rares include Beacons
- Chaos Dungeon shares the wave-band design of Fortress rares
- Fortress rares raise (Idol) Corruption
- Fortress rares boost (Spice, Hot Sauce) Food healing
- Fortress rares drop per wave in Fortress (skilling raid)
- Fortress rares expand (Satchel) Inventory and satchels
- Fortress rares include the Fortify Tools
Arrows show who acts on whom: → this system acts on the other, ← the other acts on this one, ↔ both do.
More in Combat and raids
Ancient and Chaos shards and slates · Chaos Dungeon · Combat · Combat styles and Life/Spirit · Corruption · Death · Delve (combat raid skill and tree) · Dungeons (tiered raids) · Fortify talent tree · Fortress (skilling raid) · Fortress Ledgers and Banners · Raid wave respawn · Slay masters · Slay tasks
Statuses: confirmed is a value or rule in the game files; observed is measured from recorded play; dev note comes from a developer comment, tooltip or patch note; inferred is worked out from the files with the assumption stated; unknown is decided on the server. Game data read 2026-10-03.