If these are indeed real, then a possibility of a printing error is not out of the question as to how the leaker got a hold of these cards
Should Dennick, Pious Apprentice die or get milled, it has a four-drop Disturb cost that returns it to the battlefield as Dennick, Pious Apparition, a 3/2 spirit with Flying
There, they were forced to mine mythril
I still think it feels a bit chaotic because of this, but the set's designs have been great nonetheless
This version of Iroh is a 5/5 for with Firebending 2 that gives all your Instant and Sorcery spells Flashback during your turn, letting you cast them from your graveyard if you pay their mana cost and exile them afterwards
In a set with so many -1/-1 Blight counter effects, this is an easy way to remove them all from said creature