These are Sagas on their front face, and then transform to the enchantment creature on their backs as their final chapter trigger
You will want to get card sleeves for your deck, and might even want to double sleeve
Burns key commons and uncommons may not spike quite so soon, but several of them are four-ofs in the same deck, and if the demand is real (as I suspect it is), they could be next to pop
The same is true for Flurry of Wings and Airborne Aid, which we have highlighted previously when Soulcatchers Aerie spiked
I dont think there is enough right now to make this deck idea work, but it is something I may work on in the future
And while we only got one preview card with the mechanic itself, you'll notice the two other cards I grouped with it, which care about cards leaving your graveyard