It contains six new cards: Arboreal Alliance, Galadriel, Light of Valinor, Rally the Galadhrim, Galadriels Dismissal, Mists of Lorien, and Galadhrim Brigade
Four mana is quite a lot for a limited fog effect, but I think it deserves a mention for its unusual design at least
Finally, I got to try this out in a Standard Event of its own: Dimir Crime Spree | OTJ Standard | Mike Flores Creatures (8) 4 Harvester of Misery 4 Hostile Investigator Instants (20) 4 Cut Down 4 Go for the Throat 4 Memory Deluge 4 Phantom Interference 4 Three Steps Ahead Sorceries (3) 3 Deadly Cover-Up Enchantments (1) 1 Virtue of Persistence Artifacts (1) 1 Unlicensed Hearse I swapped a couple of cards from CGB's build
Since its a mono-colored deck, those Arena wildcards dont have to go towards lands, unless you're like me and splash blue with Steam Vents and Riverpyre Verge to play Scalding Viper
With haste being rare in white, that allows for easy and informed counter play
Irma, Part-Time Mutant | 2 Colorless Mana, 1 Blue Mana Legendary Creature Human Mutant Shapeshifter At the beginning of combat on your turn, Irma becomes a copy of up to one other target creature you control, except her name is Irma, Part-Time Mutant, and she has this ability