Corrupted Sap

Corrupted Sap is a boss-summoning item used to summon Nimruza, Queen of the Burrowed Sands. It is crafted from the Nimruza Sanctuary found in The Passage, making it part of the progression tied to that biome and its boss encounter.

To use Corrupted Sap, place it on the boss rune associated with Nimruza. Once placed correctly, it triggers the summoning of the boss. Like other summoning items, it is meant for a specific arena setup rather than general use in the world.

The critters spawned by a Corrupted Sap depend on the biome where it is placed, not on the type of ground block beneath it. If it is placed in a sub-biome, it spawns the same critters as the main biome it belongs to. A special exception exists for Crystal Block: a Corrupted Sap placed on a Crystal Block always spawns critters from the Shimmering Frontier, regardless of the biome.

• The spawned critter type is determined by biome.
• The ground block underneath does not affect the spawn result.
• Sub-biomes use the same critter pool as their parent biome.
• Placing it on a Crystal Block always forces Shimmering Frontier critters.
• It can be crafted from the Nimruza Sanctuary in The Passage.

Because of this behavior, Corrupted Sap can be sensitive to placement when used in areas where biome boundaries or Crystal Blocks are present. For players preparing the Nimruza fight, the important part is ensuring it is placed on the correct rune so the summon occurs as intended.