Abyssal Breach Event Guide (Update 5)
A screenshot walkthrough of the Update 5 Abyssal Breach event: fifth-wave breach bosses, Rift Sigils, the event pass, Relic Crate pricing, and castle skin picks.
Quick answer
In the Update 5 footage, the Abyssal Breach event spawned a breach boss every fifth wave that paid dust and Rift Sigils — the kill we watched flashed +10 Sigils. The event repeated about hourly and its window overlapped Castle Raid timers, so you cannot fully run both at once. The reviewer's advice: if you spend at all, buy the 50-tier Battle Pass and earn crates from it instead of buying 199 Robux Relic Crates, keep Void Knight over the premium Dread Regent armor, and pick Permafrost Palace over the event's Breach Citadel skin.
Video source
All steps and screenshots come from the KingGoose video “Be the Final Boss Update 5 - Goose Reviews!” (YouTube, elRg2o-y6ak), recorded during the Update 5 era; the video does not state an exact recording date, so treat it as Update 5-period material. Numbers shown are what the footage captured, and hourly timing, shop pricing, or pass rewards may have changed since. Steps are rewritten in our own words — verify against your current game version.
KingGoose — Be the Final Boss Update 5 - Goose Reviews!Step-by-step: the Abyssal Breach event
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Fifth-wave breach bosses drop dust and Rift Sigils
While the event is running, every fifth wave spawns a breach boss. In the footage, defeating one flashed “Breach Boss defeated! +10 Rift Sigils”, and the reviewer confirms these bosses are where dust comes from — his Armor Forge screen showed a balance of 205. Treat Rift Sigils as the event currency to bank and dust as the material those bosses pay out.

Every fifth wave spawns a breach boss; this kill paid out 10 Rift Sigils. - 2
Queue the new boss abilities behind War Cry
Update 5 added Abyssal Mend, Legion's Renewal, and Rift Surge. The reviewer calls all three worth grabbing — they can even heal your own troops — but they sit behind very high wave requirements: the menu in the footage still had all three locked while War Cry (Wave 500) stayed equipped. Keep War Cry on until you unlock one, then swap.

War Cry stays equipped until one of the three rift abilities unlocks at high waves. - 3
Know what the event pass actually gives you
The Battle Pass expanded from 30 to 50 tiers in this update. The event armor Dread Regent comes from the premium track; the reviewer measured it slightly below Void Knight, and its main perk display was still blank — apparently a bug — almost a week after launch. If you buy the pass, expect a longer reward track, not a stronger meta.

Dread Regent comes from the premium pass but reviewed slightly below Void Knight. - 4
Skip the Relic Crate listing — earn crates from the pass
The limited Abyssal Relic Crate sells at R$199 for one, R$499 for three, and R$1,499 for ten, with drop rates from 52% down to 0.5%. The reviewer's advice, recorded during Update 5: don't buy the boxes — if you spend, buy the Battle Pass and get crates from it. He adds that even the 0.5% meteor unit plays worse because its explosions tank the frame rate.

The reviewer says earn crates through the Battle Pass instead of buying them. - 5
Spend your crate luck on skins: Breach Citadel vs the rest
Opening event crates from the pass gives a chance at the Breach Citadel castle skin (Secret rarity, +13% entrance shard drop rate). The reviewer ranks Permafrost Palace (+15%) above it and Dracula's Castle (+20%, a Robux skin buffed in this update) best overall — so his pick for free-to-play players is Permafrost.

Permafrost Palace stays the free-to-play pick; Dracula’s Castle leads if you pay Robux.