You can gain EXP by opening booster packs, participating in either solo or random versus battles, and getting Wonder Picks
If your Agent Venom dies at the same time as one or more other nontoken creatures you control, his ability triggers for each of those creatures
Gallery and List of Revolt Cards Aether Revolt Aid from the Cowl Airdrop Aeronauts Call for Unity Countless Gears Renegade Deadeye Harpooner Decommission Fatal Push Greenwheel Liberator Hidden Herbalists Hidden Stockpile Lifecraft Cavalry Narnam Renegade Night Market Aeronaut Renegade Rallier Silkweaver Elite Solemn Recruit Vengeful Rebel Best Revolt Cards #6
That's pretty good in any deck that runs multiple colors without Green
The threads original poster, Trycity_23, shared a video in which he and his girlfriend play the TCG doing just that
Even then, the cards that get played in multiple decks usually demand the highest prices, not cards specific to one strategy