The decks also helped the set feel like more of a return by bringing back an element players wanted which couldnt fit in the main set proper, much like the precons for Lost Caverns of Ixalan
If you then have four or more creatures in your graveyard, you can transform the card
Card Set(s) -ROYAL BLOOD- [OP-10] CARD VIEW OP10-010 | C | CHARACTER Chadros type Character card with a cost of 5 or less, you may play that card
Balancing the card-counts on this and the correct Mountain count will generally be a question dependent on your specific spell mix, but Castle Embereth seems like it will fit very well in a world where Torbran, Thane of Red Fell has reasons to be in your deck
If you're surprised at the rarity of cards this late in the pack, that could be a signal that its much safer to take it
You can pay a Blue and Red mana to cast a two-drop Explosives even with a Thalia in play, if you announce that youre casting the spell with X=1