Even before The Lost Caverns of Ixalan has been released, we are already seeing this happen
Redemption Choir has been great for me, and so anything below five mana that can repeatedly reanimate is worth a look
"Tohushaddoll Grysta", provides the Deck another way to Fusion Summon, by taking advantage of the used "Shaddoll" monsters in the GY, while also allowing using materials from the hand and/or field
Zoraline, Cosmos Caller is an Orzhov Bat typal commander that has made a splash amongst the player base
The first metal Arceus V card borrows the design from Brilliant Stars, and while that card is barely over a dollar, this metal version commands a significantly higher relative price
It changes momentum instantly, commands respect in competitive play, and holds collector prestige that puts it in a class of its own