Ethan Crossfield 
Diablo 4 players frustrated by Season 15 inventory clutter have a clear reason to check the October 28 update. Blizzard is raising the maximum stack size for Prime Evil Splinters from one to 99, removing a major pain point for players collecting the seasonal resource while pushing end-game content.
What changes in the October 28 update
The headline adjustment is simple but significant: Prime Evil Splinters will no longer occupy an individual inventory slot for every drop. The seasonal items are increasing from a stack limit of one to a limit of 99. Blizzard's notes also list general stability, visual, and user-interface improvements, though they do not provide a detailed breakdown of those additional fixes.
Prime Evil Splinters are connected to Diablo, Baal, and Mephisto, the three Prime Evils featured during Season 15. Players can equip only one Splinter at a time, but collecting extras had become increasingly inconvenient because each one required its own slot. The new stack limit should make it far easier to hold onto drops without repeatedly clearing inventory space.
Who benefits most from the inventory fix
The change matters most to players regularly farming Season 15's end-game activities. Splinters can influence content including Helltides, Nightmare Dungeons, the Undercity, and The Pit. They can be acquired from Prime Evil Echoes in Helltides as well as Capstone Dungeons, making the one-item stack cap particularly restrictive for players running those activities repeatedly.
Community reaction has welcomed the fix, but not without criticism. Some players had treated the original stack behavior as an unintended issue and were disappointed that the adjustment arrived after the season had already been underway. Others have argued that the resource itself remains difficult to obtain and would like Blizzard to revisit its drop rate in a future update.
What to expect next in Season 15
This is a focused quality-of-life patch rather than a broad seasonal overhaul. Players should not expect new activities, balance changes, or a major expansion of Season 15 systems based on the published notes. Instead, the update addresses a practical complaint that affected the day-to-day experience of collecting seasonal rewards.
Season 15, themed around Diablo's 30-year history, has brought back familiar figures, equipment, and recreated moments through the Waking Nightmares activity. Its launch also encountered a brief delay and multiple player-impacting issues. Blizzard previously issued one free Resplendent Spark through the Horadric Post as compensation. That material is valuable because it can be used in the process of obtaining an Uber Unique, although players must sacrifice an Uber Unique at an Alchemist to do so.
What players should know
- Prime Evil Splinters will stack up to 99 after the October 28 update, up from a previous limit of one.
- The resource is tied to the Prime Evils and can affect several end-game activities during Season 15.
- Players can find Splinters through Prime Evil Echoes in Helltides and in Capstone Dungeons.
- The patch also includes unspecified stability, visual, and UI improvements.
- Blizzard has not announced a Splinter drop-rate increase in these patch notes.
Expert View
Raising the stack cap to 99 is an overdue but meaningful quality-of-life fix. It does not alter Season 15's core progression, yet it removes needless inventory management from activities designed to be replayed. Players who stopped collecting Splinters because of storage friction may find the update worth revisiting, while those seeking better drop rates will need to wait for further action from Blizzard.
