The Regal Cutlass is the Pirate Leader Tetra's Level 3 weapon of her Cutlass moveset from Hyrule Warriors and Hyrule Warriors Legends.
The Regal Cutlass features a wing-like serrated blade and a Triforce mark on its guard, and a similarly designed magically infused pistol with an oddly shaped barrel.
Befitting Tetra's origins as a seafaring pirate captain, the Regal Cutlass has a Water Elemental Attribute and can fire bullets that can create a pool of water that break down enemy defenses.
Tetra wielding the Regal Cutlass & Pistol in her victory cutscene from Hyrule Warriors
Tetra sheathing her Regal Cutlass in her victory cutscene from Hyrule Warriors