Thopter Spy Network

The two halves form a closed loop: the upkeep trigger manufactures the flying artifact creatures, and the second trigger pays you for connecting with them. That self-sufficiency is what separates this from the usual blue artifact payoff, which leans on a board you supplied yourself. Here the engine seeds itself. Drop it onto an empty battlefield with any single artifact in play (the enchantment contributes nothing of its own, so you do need that one permanent), and a turn later you have a flier that draws a card the moment it lands a hit. Each upkeep widens the air force. The card-draw clause is generous but not unbounded: it triggers once for a batch of artifact creatures dealing combat damage together, so a wave that all connects in the same step draws you a single card. Split that damage across separate steps (a first-strike Thopter, say) or across multiple players, and you get a separate trigger for each, since the ability cares about a distinct instance of combat damage rather than a single global once-per-turn cap. The flavor of an espionage drone fleet that reports back what it learns is unusually literal for a card-advantage engine. The catch is tempo: no token arrives the turn it resolves, the tokens are fragile 1/1s, and a sweeper resets the whole apparatus to zero. Where an artifact engine can be Naturalized in a dozen colors, this one demands the narrower toolkit of enchantment removal, and that durability is the quiet reason it has outlived flashier blue value pieces from its era.