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Prime Evil Power Leveling raises the reputation track of one Splinter of Evil, the core mechanic of Season 15. After the seasonal questline you carry the Splinter of Diablo, Baal or Mephisto, and an Iconic Power of that Prime Evil erupts from you in combat with Fire, Cold or Physical damage. Each track holds eight activity modifiers and six upgrades to that Iconic Power, earned through the activities tied to the Splinter. You pick the Splinter and the rank range.
| Mechanic | Splinters of Evil, the Season 15 mechanic of Season of Hell's Legacy (from 15 September 2026) |
|---|---|
| How you get them | Seasonal questline with Deckard Cain: the echoes of Diablo beneath Tristram Cathedral, Baal at Arreat Summit and Mephisto in the Durance of Hate |
| Iconic Powers | Diablo: Flames of Metus (Fire); Baal: Ice of Excidium (Cold); Mephisto: Ghosts of Odium (Physical) |
| Track content | 8 activity modifiers and 6 Iconic Power upgrades per reputation track |
| Splinter of Terror | Modifies Helltide, Infernal Hordes and the Tree of Whispers |
| Splinter of Destruction | Modifies The Undercity, Lair Bosses and the Tree of Whispers |
| Splinter of Hatred | Modifies The Pit, Nightmare Dungeons and the Tree of Whispers |
| Limit | One Splinter at a time; it makes you more vulnerable to its own Prime Evil |
| Switching | Another Splinter from the largest Waking Nightmares changes the track |
| Unlock rule | Completing the seasonal questline unlocks Prime Evil Powers for all characters in that partition (Normal/Hardcore and Normal/SSF) |
| Fix (3.2.3) | Patch 3.2.3 (14 October 2026) blocks using a Splinter before the questline is complete |
| Where unlocks apply | Modifiers and upgrades are unlocked through War Plans |
Note: you bear one Splinter at a time, and it makes you more vulnerable to its own Prime Evil. Moving to another track takes a new Splinter from the largest Waking Nightmares.
Using a Splinter before finishing the questline could lock a character out of Prime Evil Powers. Patch 3.2.3 of 14 October 2026 prevents it, and a character that is already stuck regains access once the questline is done on a new character in the same partition.
The one whose activities you play most: Terror for Helltide and Infernal Hordes, Destruction for The Undercity and Lair Bosses, Hatred for The Pit and Nightmare Dungeons.
More answers: FAQ
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