Choose Splinter of Terror in Diablo 4 Season 15 for Helltides and Infernal Hordes, Destruction for Kurast Undercity and Lair Bosses, or Hatred for the Pit and Nightmare Dungeons. Your planned activity is the clearest starting point because each choice supports a different part of the endgame. Apply that same goal-first thinking to any equipment budget involving D4 Gold before committing resources to upgrades.

Unlock your choice through the seasonal questline

Complete the Season of Hell's Legacy questline to gain access to the Prime Evil choice. The story takes you through encounters with the echoes of Diablo, Baal, and Mephisto before you assume a Splinter of Evil. Start with that quest progression when your goal is unlocking the system.

Match the Splinter to your next activity

Terror periodically releases Fire damage, Destruction deals Cold damage, and Hatred deals Physical damage. Their activity bonuses provide another reason to choose carefully: all three affect the Tree of Whispers, so Whispers alone do not distinguish them. For a mixed session, use the activity you intend to repeat as your deciding factor.

Each reputation track contains eight activity modifiers and six upgrades to its Iconic Power, the combat effect associated with that Prime Evil. You build reputation through activities linked to your selected Splinter. Consider which track you want to develop, not just which damage type sounds appealing.

Account for the cost of changing direction

Only one Prime Evil Soul Splinter can be active at a time. Changing your choice requires acquiring another Splinter from the largest Waking Nightmares, which become replayable for rewards on Torment difficulties after their seasonal introduction. Carrying a Splinter also increases your vulnerability to its associated Prime Evil, which can hunt you in return. Switching therefore deserves a deliberate decision.

Choose your next repeated activity, then match your active Splinter to it. Before deciding to buy Diablo 4 Gold, identify the equipment upgrade you actually need; keep that spending decision tied to a concrete build goal.