This 3D-printed 1/2 sheath is from Dragonforged Creations. It fits the standard Mythic Legions long sword (not included). It also includes a separate clear "clip" that you can use to clip onto a Mythic belt. It also has a back peg that can plug into a 1.0 figure's back. This comes unpainted.
Long Sword Sheath - Unpainted
All 3D-printed items are meant to be handled with care. They are intended for display. Painted versions are sealed for protection, but once again, they should be handled carefully to avoid damage. Any 3D add-ons will require some kind of putty or adhesive in order to secure it to your base figure.