Mephisto (Echo of Mephisto) - summon materials and loot table - Diablo IV Season 15
Mephisto (Echo of Mephisto) is a Diablo IV Prime Evil - Waking Nightmare (largest tier / Capstone) found in Durance of Hate, reached via Travincal (assemble Khalim's Will from the heart/eye/brain/flail, then smash the Compelling Orb). Summon it with 0x None - quest/story gated for the seasonal fight + 1x Crux of the False Prophet.
Summoning materials
0x None - quest/story gated for the seasonal fight - from Unlocked by progressing the Season of Hell's Legacy seasonal questline
1x Crux of the False Prophet - from Reported elsewhere as a Mythic-tier material tied to a repeatable Echo of Mephisto encounter; exact acquisition path not confirmed
Loot table
Guaranteed 1 Mythic Unique per kill (patch 3.2.1 buff: 'increased overall loot quality for Echo of Mephisto, including a guaranteed Mythic Drop')
Details
Tier
Prime Evil - Waking Nightmare (largest tier / Capstone)
Location
Durance of Hate, reached via Travincal (assemble Khalim's Will from the heart/eye/brain/flail, then smash the Compelling Orb)
Requirement
Story-gated; pinnacle Capstone replay from Torment X+ (does not scale down)
Tips
Currently the single fastest guaranteed-Mythic farm besides the Corrupted Reaper, per patch 3.2.1 notes.