Underground Crimson

Underground Crimson are only spread in Hardmode the Monsters can drop Soul of Nights and Ichors is an alternate version of Underground Corruption but contains Ichor. in the 1.2.4 the Underground Crimson have an unique music, instead of using the Surface Crimson music. the monster is harder in Underground Crimson and made of Crimstones and Crimsands and Deathweeds

Enemies
in the Underground Crimson have more enemies and harder enemies.

Ichor Sticker,Floaty Gross,Crimson Axe,Blood Feeder and Blood Jelly

Drops; Floaty Gross Banner,Crimson Axe Banner,Blood Feeder Banner,Blood Jelly Banner,Ichor (dropped by Ichor Sticker),Meat Grinder (from Floaty Gross and Crimson Axe),Vertebrae (From Floaty Gross) Vitamins (From Floaty Gross),Soul of Night (Any enemies 1/5 chance),Crimson Key Mold (any enemies 1/2500 chance)