Howling Stones
Tier 1
- Sentient Bile
- The Golem Master (north spawn)
- The Spectre Sepulcher (north spawn)
- a crypt wurm
Tier 2
- The Crypt Keeper
- The Golem Master (west spawn)
- The Spectre Sepulcher (west spawn)
Tier 3
- Skeletal Procurator
- The Skeleton Sepulcher
Tier 4
- Embalming Fluid
- The Crypt Feaster
- The Spectre Spiritualist
- a Crypt Spectre
Tier 5
- The Crypt Excavator
- Reanimated Plaguebone
- a Howling Spectre
- Mortiferous Protector
Tier 6
- The Undertaker Lord
- Drusella Sathir