Lots of the cards appear on their surface to have little reason to be in the deck (such as the aforementioned James, Wandering Dad) but they feed into the decks play style in different ways
Unlike Aristocrats, which are built around sacrificing low-cost creatures, Sacrifice decks are built around sacrificing all kinds of permanents, including forcing your opponents to sacrifice as well
Themberchaud, from Dungeons & Dragons: Honor Among Thieves, deals massive damage based on the number of Mountains controlled, making it a formidable force in mono red decks
It seems great for a budget deck and possibly good enough to be a real tier option in our new Standard format, depending on how the meta shakes out
Finally we get a board wipe that misses enchantment creatures and can become an enchantment creature itself, with Cacophony UnleashedCacophony Unleashed
A couple of sagas have been made non-traditionally, but this is definitely my favorite for how rich the colors came out and how much definition the various figures have despite being made out of the same material