The best budget Dragon Commanders are Lathliss , Dragon Queen , and Rivaz of the Claw
Even if its more likely to be a source of bonus value or side benefit than the main defining pillar of a deck, providing another source of pressure or combat potential at such low deckbuilding cost especially one thats unpredictable to opponents makes it an excellent bonus to look for

At time of this writing, the top 10 most used colorless artifacts that draw cards for Commander decks, per EDHREC, are: Mind Stone Casting Cost: 2 Type: Mana rock Commander's Sphere Casting Cost: 3 Type: Mana rock/draw utility Skullclamp Casting Cost: 1 Type: Equipment, draw utility The One Ring Casting Cost: 4 Type: Legendary Artifact, draw utility Herald's Horn Casting Cost: 3 Type: Cost reduction/draw utility Sensei's Divining Top Casting Cost: 1 Type: Deck manipulation Idol of Oblivion Casting Cost: 2 Type: Draw utility Vanquisher's Banner Casting Cost: 5 Type: Creature buff/draw utility Lifecrafter's Bestiary Casting Cost: 3 Type: Scry/draw utility Mystic Forge Casting Cost: 4 Type: Deck manipulation Modern Artifact Draw Top 10 The Modern format is known for its fast-paced and innovative playstyles
EvokeExile a blue card from your hand
You couldn't have a Magic the Gathering and Dungeons & Dragons crossover set without dungeons playing a massive part
Summon: Yojimbo Summon: Yojimbo is a big dude for its cost and the effects in each chapter are great considering the first one is hard removal that is worth the price of admission on it's own