Yes, I would want it to have restrictions. Either MV, only certain creatures, only vanilla creatures. Something to make it not instantly banned. I haven't considered what would make it fair, but I want more of those creatures.
But wouldn't it take the 'special-ness' of those creatures if you could use every or part of all creatures this way? Wouldn't it be cooler to just have more creatures with the relevant wording and dedicated design and ability?
I like swarm decks. I have built
Persistent Petitioners, both rats, and Shadowborn Apostles before. As long as the commander gave some kind of lord effect, preferably something that got stronger the more creatures were out, I would be perfectly happy. Something like: 'Ayulon, King Among Bears: 3GG; You may have any number of cards named "
Forest Bear" in your starting deck. For each creature you control named "
Forest Bear," bears you control gain +1/+1.'
I don't think it should be literally any creature, and the creatures granted this shouldn't be particularly strong. I don't think 'Elflord, Lord of Elves; You may have any number of cards named
Priest of Titania in your starting deck' would be a good idea. I know it's a newer effect (relatively), but I still would like there to be more than four creatures and a sorcery with it. Preferably more creatures.