The Hollow Floor 3 Puzzle (Grave Lock) – How to Get Festering Felix
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To get Festering Felix in Roblox The Hollow, take the hub elevator to Floor 3, find the Demonology room, work out each of the eight graves' lifespan (death year minus birth year), enter the icons of the three shortest lifespans from shortest to longest on the coffin lock, then carry the relic back to the elevator. Reported, not confirmed by Roblox.
Reward collection deadline: Nov 2, 2026, noon PST / 20:00 UTC (Nov 3, 04:00 UTC+8). The Hollow end time and schedule.
Floor and reward facts
Confirmed Official badge: Festering Felix (1158209636385797).
Confirmed 809,006 total awards; 798,617 past-day awards. Snapshot: · Roblox badges API. Awards are not unique players or guaranteed avatar-item claims.
Confirmed Night 3: Biter, 2026-10-24 (PT) · @Roblox on X.
Reward route and puzzle method: Reported, not confirmed by Roblox. The hub badge has no official description confirming these steps.
Floor 3 walkthrough
Reported, not confirmed by Roblox- Take the hub elevator to Floor 3.
- Find the Demonology room in the maze (layout differs per player).
- Note each grave's icon, birth year and death year (eight graves).
- Subtract birth year from death year for each.
- On the coffin lock, enter the icons of the three shortest lifespans, shortest first. Order matters.
- Take the relic and return to the elevator without being caught.
- Step out into the lobby; Festering Felix is awarded then.
How to calculate and sort the grave lifespans
For each of the eight graves, write its icon beside its birth year and death year. Subtract the birth year from the death year, then sort the resulting lifespans from shortest to longest. The coffin needs the icons of the first three graves in that order; the earliest birth year or death year alone is not the answer.
Use the years on your own graves. This guide does not supply example years or a universal icon code. Order matters: enter the shortest lifespan first, followed by the next two shortest.
If the coffin does not open or Felix is missing
Reported, not confirmed by Roblox: check both the subtraction and the order of the three icons. Aprasi reports that being caught resets the run, including on the return trip with the relic.
Opening the coffin is not the claim step. Take the relic back to the elevator and step out into the lobby; Aprasi reports the badge and item arrive then. Check your Roblox avatar Inventory and the official Festering Felix badge separately.