Conjuring Altar - Lykrast/DefiledLands GitHub Wiki

Conjuring Altars spawn inside small natural structures inside the Defiled Lands. They cannot be picked up without Silk Touch and are considered active if they're inside a natural defiled biome and have enough space above them.

Right clicking an altar with a Calling Stone will consume it to spawn The Destroyer, which is also very likely to destroy the altar in the process.