There's a good bit of variety among the ones revealed so far, from the aggressive but elusive Elsa - The Fifth Spirit to the singing bodyguard Kristoff - Reindeer Keeper
Extra attack steps are very powerful in many Commander decks, especially attached to a two-mana creature
While it's likely a bad fit for your K'rrik, Son of Yawgmoth storm deck and other black decks that aren't running many creatures, Contamination is perfect for commanders like Nath of the Gilt-Leaf that can play green mana dorks and reliably produce creatures to sacrifice to keep it around
However, its in the abilities that Maleficent really shines
Each of these cards has its own set of pros and cons, and knowing which one has the best synergy with the rest of the cards in the deck is crucial to make it run properly
Its very likely that this blue enchantment becomes a blue staple, especially given that Fractured Realm is the most juiced-up Panharmonicon weve ever seen, doubling all sorts of triggers, including attack triggers