Princess Twilight Sparkle does the best magic with its Mane Six friends
It doesnt even have the once per turn clause either, which helps counter balance it against being occasionally useless against certain decks
Gluntch, the Bestower The only jellyfish in the set, Gluntch, the Bestower is a 0/5 for three that loves to group hug
The Into the Future event will also start tomorrow, allowing players to earn Alchemy Individual Card Rewards (ICRs) and Mastery Pass XP for free by playing with preconstructed decks
Giving every color access to that ability on an equipment that also allows you to play an additional land makes this into a no-brainer for decks that care about equipment, card selection, and playing lands
UPDATE: Using Your Graveyard for Value If the self-mill route is the one you decide to explore, grabbing a few cards that return cards from your graveyard can go a long way