Urtet is the best myr commander, as its the only one that actually interacts with a deck full of myr creatures
His I Sentence You ability allows you to draw a card whenever your opponent discards one, which pairs really well with cards like You Have Forgotten Me and Sudden Chill from The First Chapter
The set was a stark contrast to Iconic Masters and Masters 25 and almost immediately broke Modern
This way, you can get a 6/6 for say, 2 or 3 mana, that can punish all your opponents every turn
Good in probably too many places, keep a careful eye on how many of these get cracked and come to market
Any Simic (blue/green) token deck will want to run Adrix and Nev, Twincasters and any Orzhov (white/black) token deck will want to include Kaya, Geist Hunter