With Planeswalkers prominent a part of Magic, most sets will include at least a couple Planeswalker cards
Certainly, a 5/5 trampler for with a notable triggered ability is nice, but sometimes that drawback can be a boon, such as if you also have an Orchard Warden on the battlefield and you get to gain life when Unstoppable Ash enters the battlefield as well as gain life when it leaves the battlefield since the Treefolk you exiled will return to play
As for tournament play, Hayes thinks the hate cards found in Rivals will be smart inclusions in constructed decks
As they cast it, that creature stops being prepared
But you could also use lots of different cards that animate artifacts, including Tezzeret, Betrayer of Flesh
These combine to form a 40-card deck, and you keep the cards (about 22 non-basics) as a reward