A build to roleplay as a pre-abyss Artorias.
For covenant I suggest Blade of the Darkmoon or Princess Guard.
Use a Pyromancy Flame only for Power Within, you may also want to use a Talisman instead for casting miracles, Artorias was Lord Gwyn's Blade after all, so he could probably use miracles.
You may not need the Wolf Ring, but it is cool for the cosplay, of course you can (and will need to) change it.
