He's got drawers full of lightsaber parts (which was based on creator Dave Filoni's grandfather's basement draws full of tools and parts), and he's always ready to help guide the young padawan in the creation of their first weapon.

Source: https://www.slashfilm.com/1457300/star-wars-the-clone-wars-huyang-yoda-problem/

However, if Filoni's theory is true, the cloned Zillo Beasts may not truly be monsters and may have inherited their predecessor's uncanny insight into the evil at the heart of the Empire.

Source: https://www.cbr.com/star-wars-bad-batch-zillo-beast-rebellion/

However, on top of this, Baylan's lightsaber might have secretly revealed who his Jedi Master was, a famous character very close to director Dave Filoni's heart.

Source: https://www.cbr.com/ahsoka-connection-dark-jedi-baylan-plo-koon-star-wars-fan-theory/