Standout staples include Trafalgar Law, Benn Beckman, and Gum-Gum Giant all tournament-relevant to this day
Higure, the Still Wind Higure, the Still Wind from Betrayers of Kamigawa is a mono-blue commander on this list, yet tends to be more useful in the 99 because of its high mana value and lack of ninja creature support in mono-blue
Assuming you can afford to pay eight mana and unlock both Rooms right off the hop, every enchantment cast produces +1/+1 counters equal to its mana cost, and every permanent you cast immediately becomes an enchantment
Itll also be an investigate machine, allowing you to create Clues whenever creatures die, are blinked, or exiled, and that makes it a very strong fit in Azorius creature decks including Brago, King Eternal, Yorion, Sky Nomad, and the like
Seven or so mash shuffles should sufficiently randomise your deck
It can be Stax-adjacent, but it tends to be more interactable because creatures are easy to remove