Theyre usually a little bit easier to get your hands on too, because you can just buy an entirely new deck
You need to be heavy on green cards for this to pay off, but that's just fine with finishers like Craterhoof and Portal to Phyrexia
Realistically, most serious players end up using two or three of these tools
Here's what makes the difference real
Any time that I talk about ETBs and copying abilities, it almost feels obligatory to mention Dockside Extortionist but there are plenty of other great choices too
Some of the morphs like Vesuvan Shapeshifter, Willbender, and Nantuko Vigilante have value, but youd really want to move this into being a token and control deck so that your commander doesnt exile so much of your stuff