It is too unreliable to have as your sole combo yet doesn't really work well with the other combo cards that also want fat creatures in the list
Before returning to Dion, you'll get to destroy any permanent on the battlefield, which can include lands if your opponent has a problematic utility land
Set Champs promos seem to be printed on the same sheet as Enchanted cards in the main set
I'd argue that Y'shtola falls in the "too strong" category and not a fan of how power-creepy it is, but it's hard to deny that this will excite a lot of players who like obviously powerful commanders
Building Maralen with a heavy Faerie core keeps the tribal synergies intact, while additional payoffs for playing cards you dont ownsimilar to those seen in Outlaws of Thunder Junctionpush the deck into truly oppressive territory
You need blink and mill, and if you have enough of a setup to get value off this there are much better things you can do than big Orc