The answer is that there are certain spells we don't want to be instants not that they can't
In general, Thalia, Guardian of Thraben is the better of the two since it comes down a turn earlier, but there is some upside (outside of budget) to playing a split of both since Thalia is legendary, so while we can never have two copies of Thalia, Guardian of Thraben on the battlefield, we can have one Thalia and one Vryn Wingmare
Multicolor: Locke, Treasure HunterLocke, Treasure Hunter Locke, Treasure HunterLocke, Treasure Hunter is the type of card I love to see thrown into a Standard-power set
Felothar the Steadfast Felothar the Steadfast is a strong high-toughness build-around card, and its greatest strength is the activated ability
I dont really like the gamble here though, as it reminds me of Clinquant Skymage (which was generally mediocre)
Disney Lorcana Disney Lorcana is a TCG set in Lorcana, a realm where Story Stars, containing fragments of Disney stories, are combined with magical ink to create glimmers, fantastic versions of beloved Disney characters, items, or locations