For that, you'll need a bunch of creatures to put those tokens on
Target player than mills X, and Oona's controller creates an amount of 1/1 flying faerie rogue tokens equal to the number of cards milled this way that were of the chosen color
A top-tier MTG commander deck box provides just that, with features specifically designed to store and protect these larger, more intricate decks
This is what's referred to as an 'outlast lord,' a creature that benefits all your creatures with +1/+1 counters
So which one should you choose
However, with limited numbers of essential cards like 004-018-mirabel-madrigal-gift-of-the-family and 004-013-julieta-madrigal-excellent-cook, the deck really isnt a strong choice in terms of overall power