Tomentum Vitreum

Infobox

Tomentum Vitreum

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General Information
Type Info
Type Ring (Wondrous Item)
Rarity Very Rare
Attunement Required
Usage
Type Info
Charges 10
Properties Ring,Magical
Recharge This ring does not recharge naturally. See Recharge section for more details
Value 12,000-18,000 gp
Basic Description
A thin band of smoky glass shot through with hairline cracks that glow faintly when you draw blood.
Belongs To
Mordecai Reverence

Features

Glassbound Offering: at the start of each of your turns you may expend 1 or more charges (no action require). For each charge expended, you remove 10% of your maximum hit points (rounded up). If the reduction of maximum health takes you below 0 hit points you then Vitreous Ruin. This effect last till the end of combat.

Shattered Edge: Until the end of combat, once per turn when you hit with an attack that does damage, you deal an extra 1d4 damage for each charge expended from the Glassbound Offering feature. The extra damage is of the same type of the original damage type

Limit of Sacrifice: You cant expend charges from this ring more than once per combat, and you can expend more than 10 charges at once.

Drawbacks & Curse

Vitreum Ruin: if you are reduced to 0 hit points by the damage inflicted from the effects of this ring, you fall Incapacitated and remain Incapacitated for the remainder of the current combat. While under this effect, you are unable to regain Hit Points, be stabilised, or be revived by any means. At the end of combat, you become stable at 0 Hit Points.

Recharge

Exhausted Offering: To fully recharge this ring, you must accept 2 levels of Exhaustion. You may also regain half of the available recharges by accepting 1 level of exhaustion.

Dice Averages

No. of Dice Health Reduction Average Roll Max Roll
1 10% 2.5 4
2 20% 5 8
3 30% 7.5 12
4 40% 10 16
5 50% 12.5 20
6 60% 15 23
7 70% 17.5 27
8 80% 20 30
9 90% 22.5 35
10 100% 25 40

Screenshot 2026-06-16 at 18-27-59 AnyDice.png

History & Mentions

§ Interactions
Session 67 Inside the study, he found Mordecai sitting at the desk, fiddling with the Tomentum Vitreum ring. When asked where Viktor was, Mordecai pointed towards the bookshelf. Having had time to think, Mordecai had remembered his anger for Chenris, but before they could unleash it on the wizard Viktor stepped back into the room.
Session 62 Viktor then pulled the ring off his finger and handed it to Mordecai, stating that they might have more use for the ring than he would, despite it linking to Vaelrith. Mordecai took the ring, playing with it in their hand, to prick their finger to watch the ring react with their blood.