The Rune subtype doesn't have any special rules meaning, but other spells and abilities can refer to it
Put a landmark counter on Treasure Map
Lorcana Rise of the Floodborn amber Cards Cinderella, Ballroom Sensation Nana, Darling Family Pet Snow White, Unexpected Houseguest Mufasa, Betrayed Leader Bashful, Hopeless Romantic Rapunzel, Gifted Artist Christopher Robin, Adventurer If you have ambitions of creating a deck using amber cards from Rise of the Floodborn, this list is the perfect place to start
That player no longer has the city's blessing
Overall, much like Stoneforge Mystic, I'm open to giving Jace, the Mind Sculptor a trial period in Modern, with everyone knowing going into the experiment that a re-banning might be necessary if things go poorly