The Underground Crimson is a biome found underground that only spreads in Hardmode. The monsters can drop Souls of Night and Ichor. The Underground Crimson is an alternate version of Underground Corruption, but contains Ichor.
- Ichor is the Alternate version of Cursed Flames, although ichor decreases defense, and Cursed Flames damage you over time.
- Golden Shower is the alternate version of the Cursed Flame Spell.
- Now has unique music.
- Added to the game.