Waking Nightmares Boost - Diablo 4

• Pinnacle Capstone: 1 to 10 runs against one Prime Evil: Baal in Worldstone Keep, Mephisto in the Durance of Hate or Diablo in The Labyrinth.
• Capstone: 1 to 10 runs of the largest Waking Nightmares at their fixed difficulty.
• Standard nightmares, 3 to 20 runs: the dungeon-length ones at fixed world locations.
• Random Encounters: 3 to 100 of the short open-world encounters.
• Seasonal Softcore or Seasonal Hardcore, Self-play or Piloted, with the loot and seasonal progress of the runs.

• The Capstones run five to seven areas each: The Labyrinth from Cathedral Level 2 down to Hell Level 16, Worldstone Keep from Ancients' Way to the Worldstone Chamber, and the Durance of Hate through the Kurast Sewers.
• The nine standard nightmares open with the Chronicle of Nightmares sigil, among them Den of Evil with Corpsefire, Tal Rasha's Tomb with Duriel and the Forgotten Tower with The Countess.
• The popup ones are one-room fights with past bosses such as Queen Araneae, Nihlathak or Rakanishu, or waves of monsters like Flayers.

• A Seasonal character: Waking Nightmares belong to Season of Hell's Legacy.
• Torment 10 unlocked for Pinnacle Capstone runs.
• For Capstone replays, the seasonal questline done, since it is where you first meet these dungeons.

Does a Capstone give a new Splinter of Evil?

The largest Waking Nightmares are where another Splinter comes from, and a new one lets you switch Prime Evil tracks. Each kill has a chance to drop it, not a certainty.

Do these runs help Season Rank?

Yes. Halls of the Blind, Den of Evil, The Scouring of Caldeum and the Horadric Library are tied to Ranks II to V, and the Nightmare-tier Capstones on Torment IV, VI and VIII to Ranks VI to VIII.