Whether its giving more colors an equivalent to card draw, expanding the available synergy for instants and sorceries, or offering powerful open-ended payoffs, effects which include the casting and playing of other cards are everywhere now
Pretty much anything looking to win through combat
So when I say this is a trap I am basing this off of the fact that a deck built around Krark will be terrible and worse than Zndrsplt and Okaun decks already are, which is bad and mostly a novelty
Orb of Dreams is a Artifact card in Magic: the Gathering MTG
And the deck isn't even technically an Elf deck, but with 12 one drop mana making Elves, plus 4 Priests, and 4 Circles, you have 20 Elves that tap for mana, then flesh out your deck otherwise