goblin mtg card Ringleader (Elves vs. Goblins) [Duel Decks Anthology] All Goblins get +1/+1 and have mountainwalk Green Goblin, Back for More

This is a commander that can be built in various ways, be it an equipment/Voltron deck, a saboteur deck, and more

Kagha, Shadow Archdruid Kagha, Shadow Archdruid is a prime example of payoff and enabler

Unlike most other Commander precons, this deck doesnt depend on its commander to accomplish its gameplan

Magic proxies solve this problem by giving affordable access to anyone while not taking away from the rarity and value of genuine Magic cards

but I worry that a dedicated mill isnt going to pack the level of draw spells required to make it shine

A second copy of Darksteel Juggernaut or Master of Etherium with Archetype of Aggression or Goblin War Drums in play might be all you need