Stone Mask

Stone Mask
Wondrous item, very rare (requires attunement)

This stone mask clings to your face without a strap or other method of attachment. While wearing the mask, you have advantage on Dexterity (Stealth) checks made to hide in rocky terrain. Additionally, you can speak, read, and write Terran.

The mask has 4 charges and regains 1d4 expended charges daily at dawn. As an action while wearing the mask, you can expend 1 charge to cast the stoneskin spell from it without requiring material components. Additionally, when cast on yourself, the spell doesn’t require concentration.

Curse. If you drop to 0 hit points while wearing the mask, you must make a DC 16 Wisdom saving throw. On a successful save, the mask falls from your face and your attunement to the mask ends. On a failed save, you drop to 1 hit point instead and the mask permanently affixes itself to your face. The mask gains the following properties in this state:

• You can expend 1 charge to cast the spider climb spell from the mask without requiring material components, targeting only yourself.
• Siphon Essence. As an action, you can force a creature you are touching to make a DC 16 Constitution saving throw. On a failed save, the creature takes 2d10 + your proficiency bonus necrotic damage. The creature's hit point maximum is reduced by an amount equal to the necrotic damage taken, and you gain temporary hit points equal to that amount. The reduction lasts until the creature finishes a long rest. You can’t finish a long rest unless you have temporary hit points from this ability remaining. If you go 72 hours without siphoning a creature’s essence, you become petrified until freed by the greater restoration spell. The caster of this spell is instantly targeted by Siphon Essence and the spell has no effect if the caster succeeds on the saving throw.
• Sunlight Hypersensitivity. You take 2d10 radiant damage when you start your turn in sunlight. While in sunlight, you have disadvantage on attack rolls, ability checks, and you can’t regain hit points.
• If the remove curse spell is cast on the mask, the caster must make a DC 16 check using their spellcasting ability modifier. On a success, the mask cracks and is destroyed. On a failure, the spell has no effect.

The masked figure stepped out from behind a massive boulder, murmuring something in a strange language. After a brief silence, the boulder shattered and swirled around the figure, adorning his skin with a suit of stony armor. The figure loomed before the party as he strode forward, like a mountain in the moonlight.