Relics are permanent island perks you find by digging. The museum collects decor pieces from the same digs. Both are part of the excavation arc, which also trains the Excavation skill.
Finding relics
Get a cache or Suspicious Sand. Breaking the oneblock gives one Ancient Cache about every 10,000 breaks and one Suspicious Sand about every 500 breaks. Phase miners and the season shop also provide them.
Dig it with a brush. A dig can also unearth a brush, with a 6 percent chance.
A cache can contain a relic. The base chance per cache is 0.2 percent, multiplied by the grade of the cache and raised by your Excavation luck.
Caches come in three grades: Genesis, Ancient and Voidsteel. For a find from the oneblock, the grade weights are 77 percent Genesis, 15 percent Ancient and 8 percent Voidsteel. Better brushes dig faster and raise the relic chance. The relic screens show the real chances read from the server configuration.
The relic hub
Open it with /island relics. There are 20 relics in 5 families of 4.
The hub shows relics found, families completed, sockets used and every active perk.
Sockets: you have 9 sockets. Completing a family unlocks sockets, and locked sockets show what they need.
Each family card shows how many relics you own and have socketed, the set bonus and the completion reward.
A guide card explains every step: brushes, caches and sand, digging, relic chances, fusion, sockets and perks, family completion.
On a relic card:
Left-click sockets the best free copy into the first free socket.
Right-click fuses 3 free copies of the lowest fusable tier into 1 of the next tier.
Shift-click takes a socketed copy out again.
Relic bonuses are additive. Each relic adds to its own island effect, and the total per effect is capped so full sockets stay strong without breaking the game.
The museum
Open it with /island museum. The museum has 6 sets and 79 pieces. Each set pays a reward when you complete it: a title and Crystals.
To add a piece, sneak and right-click with it.
Pieces drop from Suspicious Sand digs. The set screen shows each missing piece with the sand tier and chance per dig. Two heads only drop in the world and not from sand.
The set screen has a filter for all, collected and missing pieces.
Excavation skill
Every brushed cache gives Excavation XP: sand 4, Genesis 12, Ancient 20, Voidsteel 28. Excavation luck from the skill raises your relic chance. See Skills.