The Blood Caves are a corrupted type of area, which may be accessed when entering the Caves with the Blood Moon active.
The player is also suggested to have the Lantern or the Ring of Light equipped in this area, as it is very dark (with the exception of Blood Goblin, as the Lantern and the Ring of Light are dropped by it).
Area Info
Lua error in Module:Areas at line 109: attempt to call field 'area_page' (a nil value).