He was able to gain 1 Loyalty and turn any creature into a 3/3 Elk
I'm far from completing a full exploration of the format
That leaves us with a lot of ground to cover, but it also means that, for mythics especially, the presence of a mythic from a specific set likely means that it will be the only one, due to overall space constraints
Although there are some non-spirit commanders used in some spirit typal decks, most notably Quintorius, Loremaster and Hofri Ghostforge, those decks arent my focus here
They will drop sets like Conspiracy: Take the Crown (August 26, 2016) into dead space this years Modern Masters is moved up to March, so they obviously can release it whenever they want but they have never, not once, adjusted their comprehensive Standard release schedule strictly to create dead space for a supplemental set