The Lost Primarch

One of the Lost Primarchs returns. The Primarch of the XXI Legion, a Legion no one knew about, was not dead or disappeared as thought by the Emperor originally, but just flung into another galaxy far far away. A galaxy where a strange Force holds back the influence of the Warp and makes it invisible to everything.

The Primarch falls on Ryget Undecim, a Death World by Imperial Scholars standards. Powerful beasts and dangerous Xenos infest the world and try to wrestle the minuscule human faction to the ground. When Gaius landed on the planet, he knew what he was thanks to information that appeared inside his head.

What will Gaius do? Will he become a tyrant and take over and unite his galaxy before he bothers to return to the one he came from? Or will he return as soon as possible and aid the Great Crusade?
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This is an OC and not a reincarnator. The Meta Essence I gave him is the Essence of the Lost Primarch. The setting is Star Wars and we'll see how he handles the Force.

The cover picture and all others are NOT mine. Those belong to John Stone. I found them from ArtStation. If he wants me to take them down, I will.