Ignacio is a magic +1 longsword.
As a bonus action, you can flip a switch at the hilt that allows oil to coat the sword and then strikes a flint stone to engulf it in flames, causing attacks to do an extra 1d6 fire damage. The fire lasts up to 10 minutes before needing to be reignited. The oil lasts for up to 6 hours of burn time before needing to be changed as an action.
When the sword is ignited, it lets off extra illusory flames that burn white-hot with a radiant aura. You are granted advantage on Charisma (Intimidation) checks.