Overall, Shimmering Skies Emerald/Steel Starter Deck is great for early games and learning to play, if you are looking to get more serious about Lorcana though, something higher on this list might be better
Is Mono-Red Ramp Good in EDH
-10: Chandra, Pyrogenius deals 6 damage to target player and each creature he or she controls
The deck plays a ton of creatures that can create even more creature tokens, giving you more fodder for convoke
As Mirrodin Besieged enters the battlefield, choose Mirran or Phyrexian
This change also impacts the Expertise cycle (which will no longer be able to cheat split cards into play with their "cast for free" ability), Goblin-Dark Dwellers (which can no longer flashback a Boom // Bust), and some other less popular cards as well