Finding a ruin

A Guarded Ruin is two structures joined by one hole in the ground.

On the surface there is a graveyard — a walled plot of grave mounds and a mausoleum, laid in stone that matches its surroundings. It builds in earth, sand or snow depending on where it generates, so a ruin in a desert is sandstone and a ruin in a taiga is under snow.

Thirty blocks below sits the sanctum, in a cavern the structure hollows out for itself. A spiral stair inside the mausoleum is the only way down.

You find these by looking up. Mourners — large dark birds — circle over a ruin and nowhere else, holding a slow orbit well above the treeline. A shape turning over a hillside means something is under it. They will drop to take a closer look at whoever is standing on the graves, and they roost in nearby trees between passes.

Very rarely a Mourner spawns wild in forest and dark forest, walking on the ground rather than circling. That one is just a bird, so a Mourner on foot is not proof of anything.

The graveyard

Grave mounds are not loot. Opening one wakes what is under it, and a Remnant climbs out — fast, brittle, and already moving by the time you see it. There are twenty-eight graves in a plot, so the surface half of a ruin is a fight you choose the pace of.

Graves are a placeable block. The ones worldgen lays are occupied; the ones you place are not, so carrying a stack home does not give you a portable spawner.

Below

The sanctum holds spawners, a soul-lit altar, and a Stone Sentinel standing on it. It sleeps until you come down the stair.

The Sentinel is the mod's boss and is built to be fought at close range:

• 150 health, 15 armour, 8 armour toughness, immune to knockback
• Slam — 14 damage in a 5-block radius, throws you up and back
• Sweep — 9 damage in a 4-block arc, on a shorter cooldown
• Reckoning — 20 damage, and hauls you in from up to 16 blocks away
• Sunder — breaks through what you put between you and it
• Gyre — a spin that absorbs half the damage of incoming arrows
• Bulwark — if you shoot it from somewhere it genuinely cannot reach, it shuts itself into a shell instead. Arrows come off it and the stone knits back together faster than a bow can open it. It is a refusal, not an attack: you are told the tower will not work, and left to come down or leave. When you go, it walks back to its altar and waits.

The Gilded Reliquary in the vault holds the Fractured Memories, and it will not open while its Sentinel is alive. Tunnelling straight to the vault gets you a sealed chest.

Charms and attunement

Fractured Memories are the raw material, and a Reliquary holds four to eight of them. A charm costs four Memories in a cross, four Deepslate Bricks at the corners, and a core in the middle that matches the spirit being bound:

[Deepslate Brick]  [Fractured Memory]  [Deepslate Brick]
[Fractured Memory]      [ core ]       [Fractured Memory]
[Deepslate Brick]  [Fractured Memory]  [Deepslate Brick]

Charms work from anywhere in your inventory — no equip slot, no curios dependency. You do not wear them, you carry them.

What limits you is attunement. You start with 1 and it caps at 4. Charms are applied in inventory order until the budget runs out, and vanilla numbers the hotbar first — so you set priority by moving charms to your hotbar. A charm that will not fit is skipped rather than stopping the ones below it.

Deflection is why the Charm of the Returned costs three of your four. It turns away projectiles heading for you — arrows, tridents, ghast fireballs — by looking a tick ahead at what is about to cross your path, so nothing has to hit you first for it to work. At the cap it leaves room for exactly one other charm, which makes taking it a decision about what you give up.

Echoes of Kinship raise the cap by one each. One drops from a Stone Sentinel half the time, so deeper attunement means more ruins.

Any charm can be hushed — sneak and use — which switches it off and gives up its place in the queue, so a charm further down takes the attunement instead. The setting lives on the charm, not on you.

Hovering a charm tells you whether it is Attuned or Dormant and what it costs.

Items

• Fractured Memory — the ruins' currency. Its light drifts through the four charms' colours because it has not decided yet what it will become; the name in the tooltip shifts with it.
• Mourner's Feather — shed when a Mourner is startled off a perch or shot at without being killed. Killing one ends its ruin's vigil permanently and the birds do not come back, so flushing the same bird repeatedly is the better trade. It also works anywhere vanilla wants a feather: arrows, books and quills, brushes, firework stars.
• Echo of Kinship — deep-ruin loot, consumed to deepen attunement.
• Gilded Reliquary — a ward-sealed container with its own interface.
• Grave — a mound with an occupant, or without one if you placed it.

Remnants drop rotten flesh, and rarely a handful of nuggets, flint, an amethyst shard, or a worn iron tool.

Also included

• Nine advancements covering the whole progression, from finding a ruin to reaching full attunement
• Three spawn eggs
• Custom sounds for the Mourner, the Remnant, the graves and the charms
• Works on servers; attunement is saved, survives death, and is synced only to its owner