Soul Grinder

Unlock
The Soul Grinder can be unlocked after solving all of the Tier 21 Feats. It costs 200 Cosmic Runes and 200  Death Runes and can be upgraded to a maximum of Level 2.

''Produces components to summon Spirits. Charged when humans are beaten or eaten.''

Level 1 produces Souls that can be merged into Peaceful Spirits.

Level 2 produces components for summoning Peaceful Spirits and Vengeful Spirits.

Mechanic
The Soul Grinder gets charged up when the players defeats Humans in the Lair or feeds them to the Devourer. Each Human has a certain percentage they give to the Soul Grinder in order to produce Soul components. The speed of the grinding process can be further sped up with the Help of the Superior Grind Spell.