Special moves are typically associated with Beyblades that have special abilities, like the Beyblades from the Metal series (Metal Fusion, Metal Masters, etc.).
Flame Sagittario is a classic Beyblade, introduced in the original Beyblade series (1999-2003), and doesn't have any special abilities or a designated special move.
It's possible you are thinking of a different Beyblade or a fan-made creation. Could you provide more context or information about what you are looking for?