Praesidium

Praesidium is a component added by Blood Magic. It is used in the creation of the Defensive Core.

Recipe
Praesidium is created by placing one redstone, one cobweb, one iron ingot, one Tenebrae, and a Strengthened Catalyst into an Alchemic Chemistry Set with at least a Magician's Blood Orb with 1,000 LP stored in the owner's network.