Crimson Falcata

"A short-bladed sickle-sword. Made from the elusive red rock, quarried on the Isle of Penance. Crafted by a master blacksmith. Adorned with cryptic runes."
Crimson Falcata is a One-Handed weapon found in the Tomb of Hieronymus on Graefir Island.

"Unnatural forces linger in the black runes of this red blade."

Location
Found in the Tomb of Hieronymus on Graefir Island.

In order to find it you'll need a Cipher Stone, a Rope, an Advanced Lock Pick and a Torch.