While we can argue about whether Signets themselves are simply too good for Standard, I think most people would agree that if they aren't too good, they are, at the very least, right on the border
Myrel, Shield of Argive Myrel, Shield of Argive is sometimes better than a token doubler by counting your token and nontoken soldiers
Like the other Mirran swords, Fire and Ice grants +2/+2 as well as protection from two colors, this time Red and Blue
Attacks using warrior skills
Give Me A Reason Not To The point of these designs is not to make snow lands unplayable or unseat the new mechanic of the new set before it ever gets off the ground
While we dont know much about Bloomburrows official mechanics, the official preview on MTGs website shows the four preconstructed Commander decks and offers a few hints