Fearless Swashbuckler

The attack trigger is the whole reason to build around this: it wants two different subtypes swinging in the same combat, a Pirate and a Vehicle, and pays out draw three, discard two only when both are present. That is a net card every turn plus deep hand filtering, but the condition is a puzzle you have to assemble on the board rather than a bonus that falls into your lap. The haste-granting line is what makes that puzzle solvable at speed: a Vehicle cast on the turn you want the payoff would ordinarily sit out combat with summoning sickness, so the static ability lets a freshly deployed machine crew up and attack alongside the Pirate the moment it arrives, no waiting a turn to feed the trigger. The design's real interest is that it underwrites a Pirate-and-Vehicle hybrid it presumes nobody else will support: the two subtypes rarely share a color pair, rarely a mechanical throughline, and almost never a card that cares about both attacking together. This three-mana body is the connective tissue for that build, converting a mixed board of aggressive Pirates and crewed machinery into an attack-step card engine, on the condition that you keep both halves alive and swinging in lockstep. Its own haste means it can start bridging that gap the turn it lands.