Branded (Master of All, #1)

Worse, his only weapon is a magical branding iron, which seems to have one skill and one skill only, to overwrite slave brands. Thing is, monster girls seem pretty grateful about being freed from the tyranny of their masters, and with each one he brands, the stronger he becomes.

And that's a good thing because in a world under siege, William and his magical branding iron might be the only thing that stands between them and complete annihilation.

Please Note: This novel contains a harem and adult situations. You have been warned.