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 1/5 (20%) chance to drop a Soul of Light. In Expert Mode, this chance increases to a 9/25 (36%) chance.

Additionally, small pockets of Underground Hallow can be created through the breaking of Demon/Crimson Altars, which has a 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]

Characters

Illuminant Slime
Illuminant Bat
Chaos Elemental
Spectral Elemental
Enchanted Sword (NPC)
Hallowed Mimic
Hallowed PigronWhile overlapping an Ice biome in Hardmode

Hallowed Underground Desert

:

Dreamer Ghoul

Unique Drops

From Illuminant Slimes:

From Chaos Elementals:

From Spectral Elementals:

Spectral Elemental Banner

From Enchanted Swords:

Blade Staff

From Pigrons:

Bacon

From Hallowed Mimics:

From any enemy:

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)

From terrain:

From Fishing:

Music[edit | edit source]

These music tracks play while the player is in the Underground Hallow. Like most other tracks, they can be recorded with Music Boxes. When Otherworldly music is enabled, the track from Terraria: Otherworld will play.

#	Title	Condition	Album	Version	Listen	Description
10	Underground Hallow	Underground Hallow	Vol. 1	1.1		This track is a combination of the Hallow and Underground tracks. It shares the heavenly tone of the Hallow tracks, but with a faster-paced, electronic tune.
78	Underground Hallow (Otherworldly)	Underground Hallow	n/a	1.4.0.1		A sinister track which seems to involve different percussion instruments such as xylophone.