Prototype your own card game or create proxies with Wet Erase marker
Sapphire fuels your strategy by generating extra ink and ensuring you always have resources for big plays, while Emerald adds evasive characters and trick cards to frustrate your opponents game plan
with enough creatures you should be able to get one or two through for a huge sweep of damage

Call for Backup Commander (1) Creatures (39) Abzan Battle Priest Abzan Falconer Alharu, Solemn Ritualist Armorcraft Judge Brawn Champion of Lambholt Conclave Mentor Conclave Sledge-Captain Constable of the Realms Death-Greeter's Champion Elite Scaleguard Emergent Woodwurm Enduring Scalelord Falkenrath Exterminator Fertilid Flamerush Rider Forgotten Ancient Genesis Hydra Good-Fortune Unicorn Guardian Scalelord Gyre Sage Hamza, Guardian of Arashin High Sentinels of Arashin Incubation Druid Juniper Order Ranger Kalonian Hydra Krenko, Tin Street Kingpin Managorger Hydra Mikaeus, the Lunarch Mindless Automaton Mirror-Style Master Pridemalkin Restoration Angel Rishkar, Peema Renegade Shalai and Hallar Slurrk, All-Ingesting Sunscorch Regent Triskelion Wood Elves Instants (9) Dromoka's Command Generous Gift Heaven // Earth Hindervines Inscription of Abundance Inspiring Call Return to Nature Semester's End Swords to Plowshares Sorceries (3) Cultivate Kodama's Reach Path of the Pyromancer Enchantments (4) Flameshadow Conjuring Ion Storm Together Forever Uncivil Unrest Artifacts (6) Arcane Signet Commander's Sphere Fractured Powerstone Ichor Elixir Sol Ring Strionic Resonator Lands (38) Bretagard Stronghold Canopy Vista Cinder Glade Command Tower Evolving Wilds Exotic Orchard Field of Ruin Forest x6 Fortified Village Furycalm Snarl Game Trail Gavony Township Jungle Shrine Kessig Wolf Run Krosan Verge Llanowar Reborn Mossfire Valley Mosswort Bridge Mountain x2 Path of Ancestry Plains x5 Rogue's Passage Sungrass Prairie Temple of Abandon Temple of Plenty Temple of Triumph Temple of the False God Terramorphic Expanse Commander, Theme, and Strategy Call for Backup is headed by Bright-Palm, Soul Awakener with Shalai and Hallar as the backup commander (no pun intended)

Puresteel Paladin Knights don't normally give card advantage
It costs only 1 white Mana, so you could get this out on turn 1 to start doing its work