If you end up running some of the Goblin token producers like Dragon Fodder or Goblin Rabblemaster, Castle Embereth plays very well alongside them
Another product great for learning the game are the Pokmon TCG: My First Battle decks
For each odd result, put a +1/+1 counter on a creature of your choice

Scientists Aang's Journey Absorb Vis Abzan Monument Aerial Surveyor Ainok Guide Ambitious Farmhand Analyze the Pollen Ancient Excavation Archaeomancer's Map Armillary Sphere Ash Barrens Assassin's Trophy Atalan Jackal Attune with Aether Avengers Disassembled Bant Panorama Battle Plan Beamsaw Prospector Beanstalk Giant Beanstalk Giant Beneath the Sands Bioengineered Future Biomechan Engineer Biotech Specialist Bitterthorn, Nissa's Animus Blighted Woodland Bloomvine Regent Bloomvine Regent Borderland Explorer Borderland Ranger Borough Backup Boseiju Reaches Skyward Boseiju, Who Endures Boundless Realms Bountiful Landscape Braidwood Sextant Brave the Wilds Brokers Hideout Burnished Hart Bushwhack Cabaretti Courtyard Campus Guide Canoptek Wraith Caravan Vigil Case of the Shattered Pact Celebrate the Harvest Centaur Rootcaster Changeling Wayfinder Circuitous Route Civic Wayfinder Clay-Fired Bricks Cleansing Wildfire Colossal Collision Coming Attraction Compass Gnome Contaminated Landscape Cultivate Cycle of Renewal Dance of the Tumbleweeds Dauntless Scrapbot Dawntreader Elk Deathsprout Deceptive Landscape Deep Reconnaissance Demolition Field Dig Up Diligent Farmhand Dire-Strain Rampage Dismissive Denial District Guide Divert Disaster

Credit: Wizards of the Coast Vronos, Masked Inquisitor FromTheShire: Cool way to provide protection for planeswalkers with the plus ability that isn't the usual +Whatever: Make a token
Every single pack is also guaranteed to have at least one Multiverse Legend a reprint of an iconic legendary creature with a special showcase frame from its home plane