Conformer Shuriken is an ideal way to swing past arbitrarily large tokens owned by green players, and the fact it also grows your own board is fantastic
Urza, Lord High Artificer To probably no one's surprise, Urza, Lord High Artificer, is the best Mono-Blue Commander on this list because he does everything Mono-Blue Artifact decks want, and he does it all for just
You can also use it to save your own graveyard in a pinch, including Endurance if you stack the triggers correctly
Original Dual Lands Original dual lands such as Underground Sea, Volcanic Island, Tropical Island, and Tundra are highly desirable because they are powerful, playable in older formats, and on the Reserved List
Finally, theres Afflicted Deserter, a four mana 3/2 that turns into Werewolf Ransacker, who destroys an artifact as they transform, and can then damage the controller of that artifact for three damage too