Casting a spell for zero mana
If you're seeing a pattern among the stuff we can't play, it's called Nekusar, the MindrazerNekusar, the Mindrazer
3 Blackblade Reforged The return of this legendary weapon in Dominaria was a big deal for long-time Magic fans, so much so that Ferguson, the artist behind its original incarnation, was called upon to create a special version of the card for its appearance in Signature Spellbook: Gideon
A 5-mana 7/3 with Trample is probably something youd play more often than not, especially in a set with lots of Pack Tactics, since he can trigger it all on his own, but what really makes Zalto powerful is the fact that in most cases your opponent will have to at least give you the value of Venturing into the Dungeon once
Marath, Will of the Wild Marath, Will of the Wild is a classic Naya commander, and the reason Ulasht, the Hate Seed doesnt make the list
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