Name: Thyxa
Other names: Wthpskin, Omega Iron, Corestuff
Creation: N/A
Creator: Naturally forms within iron-based planetary cores.
Uses: Superstructure and hull construction.

Thyxa is a very dense, very durable allotrope of iron approximately five times stronger than steel found inside planetary cores, and one of the few rare SEMs that could be found to occur naturally before the Enlightenment. Thyxa was discovered by the Lilithim, and is used extensively in the construction of their pre-Expansion Wthpships.