Activities
Waking Nightmares
Old Diablo places and bosses, back for Season 15.
What they are
Waking Nightmares rebuild places and fights from Diablo I, Hellfire, Diablo II, Diablo III and Diablo Immortal. Nearly 20 old bosses return. They come in three sizes.
The largest ones
You first meet them in the seasonal questline. After that they can be replayed on Torment tiers for rewards, at a fixed difficulty. From Torment X they also appear as pinnacle capstones with more risk and more loot. This is where you claim a Splinter of Evil, or change the one you carry.