For each counter Boon of the Spirit Realm has, every creature you control gets +1/+1
But be aware that determining what cards make sense to still be in your opponents hand is an important part of getting the most out of Meddling Mage, and thus the ability to improvise and utilize context clues will get allow you to get even more out of the card
Hope we see something inspired by his "Starry Night" painting as well I would recommend you reread this article My bad, I forgot that VG was not the artist behind The Scream
During the End Phase, if this card is in the Graveyard because it was sent there this turn: You can add 1 Level 4 Winged Beast-Type monster with 1500 or less ATK from your Deck to your hand
As well as that, Coram, the Undertaker is arguably a better fit for your Command Zone than the face Commander, Disa, the Restless