Mickey Mouse Playful Sorcerer is a powerful boon to the Broom deck strategy
This is an Equipment-focussed deck where your goal is to increase the power of your Creatures to 7 or beyond, with this magic number activating new abilities, like card draw and Treasure generation
There are previews of some neat Double Faced cards, which can show two sides/forms of a particular character or creature, with the examples used including Garland, Knight of Cornelia which flips to become Chaos, The Endless , and Cecil, Dark Knight becoming Cecil, Redeemed Paladin (spoilers!)
You're going to be running enchantment creatures, and Yuna gives enchantress decks a bit more of an aggressive playstyle by giving them lifelink
It's an artifact and an equipment in a set where both of those things matter
It's totally achievable in a Golgari commander deck, particularly if you run a lot of mutants as well