Oculum Infernae

The Oculum Infernae is an enormous telescope with magic lenses and cantilevers. When properly aligned and calibrated, the Oculum Infernae allows the user to view the heavens with perfect clarity.

This allows the user to predict astral conjunctions and celestial events unerringly - knowledge that Skullshank can use to summon an army with greater power than usual. With the precise timing and information gleaned from the Oculum Infernae, the summoning will become permanent.