Unfortunately, the biggest weakness to Shimmering Skies is that it doesnt add any viable new deck builds to the game
This card depicts the scene where the Wind Crystal chooses the Onion Knights to become the Heroes of Light
If Minwu or another Cleric you control is dealt lethal damage at the same time that you gain life, it will die before Minwu's last ability would resolve
In time, either deck may prove to be great for competitive play, but right now, I'm not convinced either are as competitively viable as Rise of the Floodborn 's Amethyst/Steel deck , which is arguably still the most powerful Starter Deck to date
True to her sly fox form, Madam Mim, Fox has the Rush keyword, letting the card challenge on the same turn its played - making that five strength a great way to spring a surprise ambush on your opponents