Third: The Universe Within Now, I already know this is going to be controversial, but I also think it needs to be said: lately, Magic has been losing its identity
Notably, opponents can't try to change by how much Emry's cost is reduced
Things get stupid when you copy a Flowering of the White Tree and give +4/+2 to your legends, or when you copy a legendary creature that has a strong death trigger like Atsushi, the Blazing Sky
Its another type of card that I dont think gets there in a lot of metas if played fairly, but gets so much better if you can reliably sacrifice it, since locking something down if its tapped isnt useless but isnt great either
Sure, having a creature in your graveyard is a foregone conclusion, but having a noncreature permanent is not