Rictus of Terror is a Unique Helm in Diablo IV Season 15. It comes from Duriel (Lair Boss loot table) - one guide S13 guide.
Unique power
Command Laalish is now an Ultimate Skill and deals [100 - 120]%[x] increased damage. Command Laalish's Terror Realm lasts 50% longer and, while you are within it, your Abyss Skill casts do not break Shadowform Stealth.
Affixes
Willpower
Cooldown Reduction
Where it drops
Duriel (Lair Boss loot table) - one guide S13 guide