Freejam Regent

Six mana on the cost line is fiction in an artifact deck: tap enough metal and this flier arrives well ahead of curve, a 4/4 evasive body that costs whatever your Servos and Thopters and spare Equipment can chip in. Improvise does the same structural work Convoke does for creature decks, converting a wide board into a discount, and this Cat Dragon is the payoff that turns an artifact glut into a flying clock rather than incremental value. The pump is the other half of the design. The body alone is unremarkable for its slot, so the ability exists to make leftover mana lethal: each activation costs a generic plus a red, and every pair you can pay stacks another +2/+0 onto the crackback turn, scaling the kill faster than a defender can grow to meet it. That creates a genuine sequencing puzzle, because improvise wants artifacts tapped to deploy the Regent while the pump wants mana untapped afterward. The reward goes to the turn that does both: land it early off tapped permanents, then hold enough sources to fuel the beats. It is a finisher built for the board-flooding artifact decks that already have more permanents than they can profitably spend, giving that surplus somewhere to go besides small ground bodies.