Unlike usual Secret Lair releases, which tend to just be new art on old cards, these were brand new and mechanically unique cards
Elrond, Master of Healing The Green and Blue Scry archetype has potential within the LTR Limited meta with Elrond, Master of Healing handing out +1/+1 counters while potentially drawing a card when a creature with that counter is targeted
Iona, Shield of Emeria First Printed: 2009-OCT Banned: 2019-JUL Ionas ability to lock entire colors out of the game makes it brutally efficient at removing agency from other players at the table, especially when opponents are playing 1- or 2-color decks
Coveted Peacock: Great way to get rid of a pesky creature, but it's a lot better to remove it with targeted removal
You can even include Auras into the mix to give Michonne, Ruthless Survivor even better stats to keep it even more protected
There are no new previews of them yet, but we know Vehicles will be playing a big role in the set (and that white/blue is all about them) as well