In practice this will play out as a way to fill opponents yards in order to make your Rise of the Dark Realms or Command the Dreadhorde worth casting
The biggest con is that you need to open packs to collect wildcards for use in crafting
Cycling, dredge, loot, surveil, or simply drawing that many cards youll have to discard down to 7 in your end step
Primordial Hydra Primordial Hydra is a finisher for many decks, even if it's slightly more costly than others at
I did exactly that in my most recent game playing Prossh, and since my creatures had haste with Anger in the graveyard, I was able to finish off my last opponent in the same turn
Three Arrows is a three-cost action that deals two damage to one character and another one damage to another