You can't just tack on a background card to your pre-existing Thalia, Guardian of Thraben stax deck
A standout item is the 1998 Pokmon Prototype Test Holo No

Key features include: Real-time pricing : Updated hourly (TCGPlayer) to daily (Cardmarket) across all major marketplaces Multiple variants : Separate pricing for differents variants (depends on provider) Historical trends : Track price movements over 1, 7, and 30-day periods (depend on provider) Global coverage : Data from Europes Cardmarket and North Americas TCGplayer Embedded data : Pricing included directly in card responses - no separate endpoints Available Marketplaces Section titled Available Marketplaces Our API covers the two largest Pokmon card marketplaces globally: Cardmarket (Europe) Section titled Cardmarket (Europe) Currency : EUR Coverage : Europes largest TCG marketplace Update frequency : Daily Data points : Current averages, trends, lows, and 7/30-day historical data Variants : Standard and holo-specific pricing TCGplayer (North America) Section titled TCGplayer (North America) Currency : USD Coverage : Leading North American platform Update frequency : Hourly to daily Data points : Low, mid, high, market, and direct pricing Variants : Normal, reverse holo, and holo variants Pricing data is automatically included in every card response under the pricing field

Here is the list my testing mates Jesse Hampton, Zevin Faust, Charles Wong and I registered for Pro Tour Final Fantasy
Build your investment case on current realistic comps
While they are largely based on classic features from the Pokmon series, many of them have a unique spin on how they are used in the popular mobile game