Illvoi Operative

Prowess counts every cast; this counts the second cast each turn, and that single word reshapes the entire deckbuilding math. A prowess creature spikes on each spell and deflates at end of turn, rewarding a one-window burst of cheap cards. This wants a cadence instead: chain two spells a turn, every turn, and the counters never leave. Because the trigger waits for your second cast rather than firing on each one, the first spell of every turn is always setup, and the growth is permanent rather than a temporary swing. That pushes the shell toward a steady two-spell rhythm (cantrips, cost-reduced sorceries, anything that keeps the second cast reliably online) rather than a single explosive turn. As a 2/1 for , it dies to almost anything and produces nothing the turn it lands, so the body is a down payment that only returns value if the deck is built to feed it turn after turn. The reward, though, has real shape: a threat that a control or removal-light opponent has to spend a card on early, before a spell-dense curve turns into a clock that resets nothing at the end step and only climbs.