Maverick Thopterist

The structural trick is where the discount comes from. Convoke taps creatures, delve exiles graveyard cards; Improvise hands the reduction to a board already crowded with cheap artifacts, which is exactly what an artifact-token deck wants to be doing anyway. The 2/2 body is beside the point; nobody casts this for the stats. The appeal is the math: a five-mana value engine that wants to cost two or three precisely when the deck is firing, then leaves two flying bodies behind on arrival. Those two Thopters cannot pay for the spell that made them (they enter after it resolves), so the discount has to come from artifacts already on the table, a sequencing puzzle the card poses on the way in. But Improvise does not use the tap symbol, so the new Thopters are not summoning-sick for this purpose: they can immediately help cast a second copy, or any other Improvise spell, the same turn they enter, and the swarm compounds within a single turn rather than only across turns. It belongs to a family of artifact-aggro engines that build a wide board of small fliers and then cash in on the count, but with the cost reduction wired directly into that swarm rather than bolted on as a separate alternative cost.