Uncommon bouncelands, uncommon mana rocks, and two common rainbow lands make it possible to stretch your manabase to take on cross-color synergies (like Temur Defenders, Abzan Counters, or Jeskai Prowess) or splash powerful rares
Hate to disappoint, but thats the Portal: Three Kingdoms version, and youre out of luck
There is a truly 'free' way to play the game for those who have the time, patience, and skill to beat other players and slowly accrue in-game resources
Advanced Search Sets Random Syntax Agent of Erebos Archon of Sun's Grace Boon of the Spirit Realm Calix, Guided by Fate Captivating Unicorn Composer of Spring Daxos's Torment Doomwake Giant Dreadbringer Lampads Eidolon of Astral Winds Eidolon of Blossoms Eutropia the Twice-Favored Favored of Iroas Forgeborn Oreads Goldenhide Ox Grim Guardian Harvestguard Alseids Humbler of Mortals Nessian Wanderer Nexus Wardens Nylea's Colossus Nyx Oakheart Dryads Pious Wayfarer Protean Thaumaturge Sage of Mysteries Setessan Champion Setessan Skirmisher Shoal Kraken Skybind Strength from the Fallen Thassa's Devourer Thoughtrender Lamia Triton Waverider Underworld Coinsmith Whitewater Naiads
For example, Common is a 1-sided circle, Uncommon is a 2-sided book, Rare is a 3-sided triangle, Super Rare is a 4-sided square and Legendary is a 5-sided polygon