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
It can be Stax-adjacent, but it tends to be more interactable because creatures are easy to remove
Includes: One Magic The Gathering Token Triumph Starter Commander Deck
Gruesome Encore and Ashen Powder are great places to start, but the options are endless
Only, have they been doing a good job with what cards they're reprinting into old border
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