The best Dragon commander in MTG is The Ur-Dragon excels for classic tribal value, Tiamat offers precise tutoring and combo setup, and Miirym dominates with explosive board states
It thrives in rocky terrains, using its powerful jaws to crush stones and defend its territory
Ultimately, I created a Feldon of the Third Path deck, as I am often wont to do, and jammed the list full of Ball Lightning and Ball Lightning-adjacent cards, like Blistering Firecat, Hells Thunder, Arc Runner, Vexing Devil, Cosmic Larva, Stingscourger, Lightning Serpent, Crater Elemental, Archetype of Aggression, Phyrexian Soulgorger, Tuktuk the Explorer, Keldon Marauders, Burnished Hart, Hellspark Elemental, and Heartlash Cinder
Silver-bullet answers on bodies: Necrotic Sliver and Harmonic Sliver plus sweep-capable spells (Decimate, Casualties of War) keep opposing boards in check