It might not seem like it, but it is a gamechanger. In Commander.
If we focus on the cards that were originally mythics, there aren’t many. Can you name them all?
When Stone Rain cost 2R it was too strong. It hasn’t been reprinted in quite a while. On the other hand, Demolish costs 3R and despite being reprinted quite a few times, it has never really seen much play (although I do regard it as a pretty good sideboard card in certain formats). That one mana extra mana just seems to be too much. The sweet spot for this effect would probably be somewhere in between.
We know History of Benalia is a good card, but what about other Sagas? Some of them are very strong in limited, at the very least, so why not try them in constructed.
You should never equate limited and constructed. They are very different formats, but if a card is very strong in limited, it probably has at leat potential in constructed. Pack Rat. Need I say more?
This probably won’t work, but do we care? No.
Yargle, Glutton of Urborg is an interesting case. MaRo has communicated to us that it’s more or less a joke. Something they put in Dominaria just to have vanilla legend in there.
However, it is quite unique. How many legendary creatures with such a high power with that mana do you have? Actually, only one bests our little frog spirit: Lord of Tresserhorn
Lauri’s request, so blame him.
… and in case you are wondering: No, this is not a real product (at least not of this writing).
Planeswalkers have been around since Lorwyn, so it’s been more than 10 years. There’s 107 of them currently in circulation. During that time with that many planeswalkers, some of them have changed their outlook to life. Sometimes quite radically. They are major characters in the story, so it should be expected of them to have some sort of an arc, which might affect them mechanically as well.
We did learn in Amonkhet that the colors of a planeswalker doesn’t necessarily limit what they can do, because Nicol Bolas doesn’t seem to have any limitations on colors of spells.
A 4/4 Vigilance for four mana is at least playable… sort of. And there’s quite a few knights available. I thought they were supposed to be rarer than soldiers?
Aryel, Knight of Windgrace
Legendary Creature – Human Knight
2W, T: Create a 2/2 white Knight creature token with vigilance.
B, T, Tap X untapped Knights you control: Destroy target creature with power X or less.