Deathless Visage is a Unique Helm in Diablo IV Season 15. It drops from The Beast in the Ice.
Unique power
Critical Strikes with Bone Spear form an echo that bursts, dealing [60 - 70]%[x] of its normal damage (3.2.1: increased from 40-50%[x]). Bone Spear deals [60 - 70]% increased Critical Strike Damage.
Affixes
+1-3 to Bone Spear
Where it drops
The Beast in the Ice (Lair Boss) per one guide
Random world drop / any Lair Boss (one guide: 'drops at any Difficulty Tier, increased drop rate per Torment tier'); 3.2.1: all Uniques drop from level 1 in any Difficulty; targetable via Horadric Cube reroll