Acolyte of Bahamut

The Background mechanic solves a real deckbuilding tension: how to give a partner-style build a second identity slot without splashing colors or committing a body to the battlefield. This one attaches its reward not to the command zone itself but to whatever commander it pairs with, granting that creature a cost reduction on Dragon spells. The effect is narrow by design: not "Dragons cost less" across the board, which would ramp an entire tribe into the stratosphere, but a discount on the first Dragon spell each turn. That once-per-turn clamp is the balancing pressure. It keeps a big-Dragon deck from chaining threats out on a single explosive turn while still shaving two mana off the tempo curve every turn you commit to a Dragon, which compounds into a meaningful head start over a game. The wrinkle worth noting is where the ability lives: the discount rides on the commander creatures you own, but that grant depends on this enchantment remaining on the battlefield. Destroy the Background and the commander loses the reduction; it is exposed to the same enchantment removal and sweepers as any other permanent, and recasting the commander does nothing to recover an effect that was sitting on the enchantment. It is a support piece by construction, useful only to a deck already built around casting Dragons, but within that lane it does exactly the job it was drawn for.