Ancient Civilization Cores: a Bellanoir raid farming route

Prepare the normal Bellanoir summon

1. Unlock the Summoning Altar at Technology level 33. Its current construction record lists 100 Stone and 20 Paldium Fragments.
2. Collect four Bellanoir’s Slab Fragments. The raid reference names dungeon and Wildlife Sanctuary sources; it does not guarantee a fragment in every chest.
3. Combine four fragments into one Bellanoir’s Slab at a workbench. Check the exact name: Libero and Ultra are different encounters.
4. Prepare a dedicated battle base and enough combat resources before offering the slab. Keep the altar away from the Palbox and important production buildings.

The raid reference warns that fighting can destroy base structures and that losing the Palbox or exceeding the encounter’s time limit can fail the attempt. Treat the summon as a planned battle, not a harmless item interaction in your main factory.

Win, claim the Cores and budget the next attempt

1. Offer the normal Bellanoir slab at the completed altar and confirm the intended raid begins.
2. Defeat the summoned raid boss while protecting the Palbox and respecting the on-screen timer.
3. Inspect the actual victory rewards and inventory for Ancient Civilization Cores. Count that exact item rather than Parts or a technology-point notification.
4. Reserve the required Cores for your recipe. For another attempt, prepare another matching slab and inspect whether the altar and base need rebuilding first.

The current Eclipsed Siren entity table lists a 1–3 Core reward entry. The older prose appendix on the general Raid page says one and also uses older boss levels. We therefore use the current entity entry for the range and do not copy the appendix’s combat stats or turn a database entry into our own measured yield.

Separate the three ancient resources

A recipe asks for Ancient Civilization Cores

Collect that material through an appropriate reward route such as the normal Bellanoir raid above, then check the recipe’s count.

You need an ancient technology unlock

Use first-clear points or Ancient Technical Manuals. A Core in your bag is not an unspent technology point.

You have Ancient Civilization Parts

Keep them for recipes asking for Parts. Their similar name does not make them interchangeable with Cores.

You cannot clear the raid yet

Improve the team and supplies before spending more slabs. Soul enhancements and condensation are separate preparation systems; neither guarantees a clear.

This page does not rank every raid or Oil Rig route by hourly output. The cited data supports a concrete acquisition path, while difficulty, server settings and your ability to win determine whether it is practical for your save.