Wondrous Item

Legendary Trial of the Drowned Silence

Abyssal Sight

While holding the Pearl of the Abyss, you gain darkvision out to 300 feet. If you already have darkvision, its range increases by 300 feet. While submerged, this sight ignores murky water, nonmagical darkness, and visual distortion caused by currents or silt.  

Breath of the Deep

You can breathe underwater, and you are immune to the harmful effects of deep-ocean pressure, crushing depths, and naturally extreme cold caused by water.  

Crushing Pressure

As an action, you may force one creature you can see within 60 feet to feel the weight of the abyss. The target must make a DC 18 Constitution saving throw. On a failed save, it takes 6d10 force damage and is restrained until the end of its next turn as invisible pressure folds around its body. On a success, it takes half as much damage and is not restrained. You can use this ability three times per long rest.  

Whispers Below

The Pearl of the Abyss reveals what water conceals. While attuned to it, you can sense the presence of hidden, invisible, submerged, or buried creatures and objects within 60 feet, provided they are touching water, soaked earth, flooded stone, or damp surfaces.  

Memory of the Drowned

You always know if a sunken object, corpse, shipwreck, or lost structure lies within 1 mile of you underwater. By concentrating for 1 minute, you learn the direction and approximate depth of the nearest such thing.  

Still the Surface

As a bonus action, you may command the sea around you to go unnaturally still. Until the start of your next turn, waves, splashing, and natural water movement within 30 feet of you cease, and you gain advantage on Stealth checks made near water. You may use this ability at will.  

Enhanced Properties (Post-Attunement)

  When attuned, the Pearl of the Abyss awakens as a vessel of Mari’s oldest and most unreachable power, allowing its bearer to wield the stillness and crushing certainty of the deep.  

Lightless Vision

While submerged, you gain truesight out to 60 feet. Illusions created through mist, reflection, water, or distorted light automatically fail against you.  

Weight of the Deep

Once on each of your turns, when you deal cold, force, or psychic damage, you may deal an additional 4d8 force damage as abyssal pressure collapses inward on the target.  

Drowned Silence

Hostile creatures within 20 feet of you while underwater have disadvantage on concentration checks, Wisdom saving throws, and death saving throws. The unbearable silence of the deep presses upon their body and mind.  

Abysswalker

You may move through water, mud, silt, flooded terrain, kelp, and magical currents without expending extra movement. While submerged, you do not provoke opportunity attacks, and you cannot be grappled or restrained except by artifacts, deities, or creatures of legendary power, at the DM’s discretion.  

Call of What Was Lost

Once per long rest, you may commune with the drowned dead. By holding the Pearl for 10 minutes, you may ask up to three questions of spirits claimed by the sea. The answers come in whispers, visions, pressure changes, and fleeting images in the water. This functions similarly to legend lore or commune, but only regarding creatures, places, or events touched by the sea.  

Special Ability: Heart of the Lightless Deep

  Once per long rest, you may raise the Pearl of the Abyss and invoke the crushing stillness at the floor of Moanakai. Choose a point you can see within 120 feet. A 40-foot-radius sphere of blackened abyssal water manifests there for 1 minute.   Within the sphere:

• Bright light becomes darkness.

• Hostile creatures are blinded unless they possess truesight or blindsight.

• The area becomes magical difficult terrain for hostile creatures.

• Any hostile creature that starts its turn in the sphere takes 5d10 cold damage and 5d10 force damage.

• A creature that fails a DC 20 Constitution saving throw at the start of its turn is also restrained until the start of its next turn.

• Sounds within the sphere are warped and muffled, making verbal spellcasting difficult. Any hostile creature casting a spell with a verbal component must first succeed on a DC 18 Constitution saving throw, or the spell fails and the slot is wasted.

• If a creature is reduced to 0 hit points within the sphere, its body is momentarily swallowed by black water and vanishes. It reappears 1 minute later in the same space if unoccupied, or the nearest unoccupied space, soaked and marked by abyssal pressure.

  When the effect ends, the sphere collapses inward with a sound like the sea inhaling.

The Pearl of the Abyss is a flawless sphere of blue-black nacre said to have formed in the lightless floor of Moanakai, where even the sea itself feels ancient, heavy, and undisturbed. Its surface gleams like moonlight on deep water, yet beneath that luster something darker shifts—as though trenches, drowned ruins, and the shapes of impossible creatures move within its core. When held, the air grows cold and damp, nearby sounds become muffled, and breathing feels subtly heavier, as if the bearer has already begun descending into the crushing dark below. This relic is not a symbol of the sea’s fury, but of its patience—its pressure, its memory, and its quiet right to reclaim all that sinks beneath it. Where the Trident of Mari is the force of the tide, the Pearl of the Abyss is the ancient truth waiting beneath it: silent, absolute, and inescapable.