Full Art versions of Trainer-Supporter cards tend to be some of the most valuable in every collection. In terms of gameplay, the Trainer card can be useful within some deck compositions
It just wins slowly with a grinding presence at the table
1 Trainer Trophy Card Pikachu Trophy Card (19971998) Snap Pikachu (Pokmon Snap Contest Promo) Tropical Mega Battle Cards (1999) University Magikarp Ishihara GX Promo (2017) Charizard Gold Star (EX Dragon Frontiers) Lugia 1st Edition Neo Genesis Pre-Release Raichu Gold Star Rayquaza (EX Deoxys) Torchic Gold Star (EX Team Rocket Returns) Masters Key (World Championships 2010) Crystal Charizard (Skyridge) Espeon Gold Star (POP Series 5) Umbreon Gold Star (POP Series 5) Crystal Lugia (Aquapolis) Shining Charizard (Neo Destiny) Mew Gold Star (EX Dragon Frontiers) Latias Gold Star (EX Deoxys) Latios Gold Star (EX Deoxys) Crystal Ho-Oh (Skyridge) Mario Pikachu Promo Luigi Pikachu Promo Shining Gyarados (Neo Revelation) Umbreon VMAX Alternate Art Moonbreon Giratina V Alternate Art (Lost Origin) The Top 30 Most Valuable Pokmon Cards Ranked 1

As explained by Reddit user BlurryPeople, The going rate for this kind of card (Fleshbag Marauder, Plaguecrafter, Merciless Executioner, etc.) has been 3 for quite a while, so to see it reduced to only 2, and with some filtering to ensure it doesnt hit inferior targets is a little nuts. A usual get-around for this type of effect is providing each player the option to sacrifice a Creature, whether it be a token or not
If a creature card with mana value 6 or greater is revealed this way, transform Runo
Where to Buy Serialized Cards Serialized cards are a bit tricky, because they're usually sold by individuals who happened to open one, or on marketplaces where they tend to be a bit scarce anyway