Underground Hallow
The Underground Hallow is a dangerous Hardmode biome, being one of the biomes that spawns when the Wall of Flesh is defeated. It is the underground version of the surface-level Hallow, and appears in the Cavern layer. It operates similarly to the surface Hallow, being comprised of Pearlstone and Pearlsand; though it spawns different enemies, along with Crystal Shards, a common Hardmode crafting material. Gelatin Crystal can also be found to summon the Queen Slime. The Underground Hallow spreads just like its surface counterpart, The Hallow, and similarly will conflict with Corruption and Crimson, as well as their underground variants.
Underground Hallow does not suppress the spawn of other underground and cavern enemies.
All enemies killed in the Underground Hallow have a 20*1/5 (20%) chance to drop a Soul of Light. In Expert Mode, this chance increases to a
36*9/25 (36%) chance.
Additionally, small pockets of Underground Hallow can be created through the breaking of Demon/Crimson Altars, which has a 33.33*1/3 (33.33%) chance to convert a single random Stone Block in the world into Pearlstone.
Note: Most characteristics of the surface Hallow apply to the Underground Hallow, with the exception of the enemies that spawn. See The Hallow for more extensive information.
Contents[edit | edit source]

Hallowed Key(from any enemy, 1/2500 chance)
Hallowed Key Mold(from any enemy, 1/2500 chance)
Soul of Light(1/5 / 1/3 chance)
Gallery[edit | edit source]
Backgrounds[edit | edit source]
This content is transcluded from Biome backgrounds § Underground Hallow.
See also[edit | edit source]
History[edit | edit source]
- Desktop 1.4.0.1:
- Added Otherworldly Underground Hallow track from the cancelled Terraria: Otherworld.
- Enemies in the Underground Hallow no longer drops the Blessed Apple.
- Desktop 1.3.0.1:
- Enemies that spawn underground have a chance to drop the Blessed Apple.
- Added Hallowed Mimic.
- Desktop 1.2.3: Added biome specific stalactite variations.
- Desktop 1.2: Enemies killed here (as well as the surface hallow) now have a chance to drop the Hallowed Key.
- Desktop 1.1: Introduced.
- Console-Release: Introduced.
- Switch 1.0.711.6: Introduced.
- Mobile-Release: Introduced.
- 3DS-Release: Introduced.