The scheme cards give the intense boss battle the epic, unique feeling it deserves, while the focused makeup of the planeswalker decks and rule tweaks smartly encourage effective teamwork even if that means the game suffers with fewer players
We can do much, much better in Constructed
Also, Neo Discovery where
Teferi, Master of Time lives up to his name with a static ability that allows you to activate loyalty abilities on opponents turns
Even if you only get a few cards off him, he's a pretty good draw engine in a Jund shell, and even as a commander he can definitely do a lot of work - he restricts what you reasonably might want to use your removal on, but turning all your removal into cantrips is quite a scary thing when he also provides a reasonable win condition on his own
Cantrip is one such mechanic