Ive built and played Miirym, and its a force to be reckoned with
There are several other cool cards that can be added to Scions and Spellcraft, including Rewind, Jin-Gitaxias, Slaughter, Turnabout, Baleful Mastery, and Deadly Rollick, but these first upgrades to the Magic: The Gathering precon for Final Fantasy should already make a notable difference
Simple slivers like Muscle Sliver cost to encore and put 15/15 worth of stats into play with just Gravemother on the table
The deck also has 3 copies of Knight of the Keep, a mediocre vanilla creature that is screaming for replacement
Runo Stromkirk on the other hand is a way more exciting build-around
First of all, it's a green, 6-mana creature, so you can drop it early off mana rocks or mana-makers around turn four or five pretty reliably