Blazing hatchet

9 attack damage | 1 attack speed

The Blazing Hatchet is a diamond axe with the ability to launch entities into the air with a burst of flame (will not work on other players) and to transform any type of burnable wood log into charcoal (does not work with the fortune enchantment).

https://youtu.be/wjLNW6Ef0iU

Location
It can be found in an item frame placed on the throne in the Throne Room of the Forbidden Castle.