Or if you reveal a mutate card, you can mutate onto Illuna, getting access to two more cards from your deck
A good deck box leaves headroom for 100 double sleeved cards, which covers a Commander deck plus tokens
Certainly, though, it seems that many decks after Into the Inklands could have the potential to be entirely location focused, much in the same way many decks currently are also item focused
Bloomburrow products, including Play Boosters, Collector Boosters, Commander decks, and more, are available now at your local game store, through online retailers like Amazon, and elsewhere Magic products are sold.
If you're able to cut it down to at least 104 or 105, try just playing without 4 or 5 of the cards you aren't sure about and playtest from there, then use those 4 or 5 as your maybeboard