You are a Magos on par with Arkhan Land or Belisarius Cawl, and you have perfect knowledge of all of the technology ever available to the Adepts of Mars, from the more commonplace Dark Age relics which are widely seen in the modern Imperium (like Void Grenades & Volkite Weapons), tech from the Great Crusade, and even brand new tech heretofore unseen, like Primaris geneseed & equipment.
Still, it seems the true heights of the Dark Age lie just beyond your grasp.