Getting free land drops and eventually free creatures whenever an enchantment hits your battlefield is powerful, and if you're already running something like Whip SilkWhip Silk to get enchantress triggers, this can cover your playmat in no time, and since it's only two mana it fits easily into an enchantress storm turn
(Some of the pilot locations tested additional product configurations, like bundles of commons, but those have been cut.) GameStop will be sourcing the cards from the secondary market

Abundant Countryside Amoeboid Changeling Avian Changeling Barkform Harvester Belonging Birthing Boughs Black Market Connections Blades of Velis Vel Bloodline Pretender Cairn Wanderer Chameleon Colossus Changeling Berserker Changeling Hero Changeling Outcast Changeling Sentinel Changeling Titan Changeling Wayfinder Chitinous Graspling Chomping Changeling Crib Swap Ego Erasure Faceless Agent Feisty Spikeling Firdoch Core Fire-Belly Changeling Flock Impostor Formless Genesis Game-Trail Changeling Gangly Stompling Ghostly Changeling Gladewalker Ritualist Graveshifter Guardian Gladewalker Impostor of the Sixth Pride Irregular Cohort Littjara Littjara Glade-Warden Littjara Kinseekers Masked Vandal Maskwood Nexus Mirror Entity Mischievous Sneakling Mistwalker Moonglove Changeling Moritte of the Frost Morophon, the Boundless Mothdust Changeling Mutable Explorer Nameless Inversion Oddric, Lunar Marquis (playtest) Omni-Changeling Omnipresent Impostor (playtest) Orvar, the All-Form Personify Prideful Feastling Realmwalker Rooftop Percher Shapesharer Shields of Velis Vel Sizzling Changeling Skeletal Changeling Springleaf Parade Stalactite Dagger Taurean Mauler The Bears of Littjara Three Tree Mascot Turtleshell Changeling Universal Automaton Unsettled Mariner Valiant Changeling Venomous Changeling War-Spike Changeling

These two decks will function around Terror of Towashi , which is a solid deathtouch creature, but has real value when it attacks and allows you to bring something back from the graveyard
So far, these keywords include: Evasive Challenge Banish Shift Exert Since the games reveal, information has been sparse to say the least, but in the last few weeks, the official Lorcana Twitter account has been slowly releasing more information, starting with the games equivalent of mana/energy sources ink
That said, it doesnt do too much for oozes specifically, but making more oozes certainly helps