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 Crystals can also be found to summon 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 66.67*2/3 (66.67%) 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.

Gallery

Backgrounds

This content is transcluded from Biome backgrounds § Underground Hallow.

On the Desktop version, Console version, Mobile version, and Legacy tModLoader version, the following backgrounds are used. On the Old-gen console version and Nintendo 3DS version, the cavern layer background for any other biome the player is in is dynamically tinted pink.

Large rocks blocking blue and pink crystals on a purple background
Diagonal purple crystals. May cause confusion with underground corruption due to purple color
Bumpy stone wall with blue and pink crystals growing out of it
(Hallowed Ice) Cracked purple ice wall with blue and pink dots. (May cause confusion with Corrupt ice due to purple color.)
(Hallowed Ice) Smooth pink ice wall
(Hallowed Ice) Bumpy multicolored ice wall
(Hallowed Ice) Smooth multicolored ice wall

History

Desktop version

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.
- Enemies killed here (as well as the surface Hallow) now drop the Hallowed Key instead of the Key Mold.
- Added Hallowed Mimic.