Brood Keeper

The reward here is conditional in a way most token-makers are not: the body does nothing until you spend a second card to enchant it, and the enchantment has to land on this specific creature. That coupling is the whole design. The trigger keys off the moment an Aura becomes attached, which means the timing cuts both ways: if Brood Keeper dies in response to the Aura spell, the Aura fizzles, nothing attaches, and you get no Dragon for your trouble. Survive the resolution and the Aura stops being a one-creature liability, because every successful attachment mints a 2/2 flier alongside whatever the enchantment does. The firebreathing line on those tokens is the part that turns chip damage into a kill: a flock of three or four can dump a full untapped mana base into a single lethal swing rather than nibbling. What it answers is the perennial sickness of Aura decks, which is card disadvantage. Most Voltron builds pile enchantments onto one creature and pray it lives; this one converts that same stack into a widening squadron, so the payoff survives the removal that the original body does not. It rewards the cheapest, most reusable Auras over the splashiest, since the trigger counts attachments rather than measuring the buff. The 2/3 frame keeps it honest as an engine to be fed rather than a clock in its own right, and its ceiling scales precisely with how committed the surrounding deck is to casting Auras at all.