If this card wasn't restricted to Team Rocket's Pokmon, I could easily see it being an auto-include in a lot of different builds
Quarter Century Stampede Booster Box RA04 Yu-Gi-Oh Quarter Century Stampede will be your last chance to get some of your all-time favourite cards as Quarter Century Secret Rares before this spectacular, shining rarity is gone forever
Battle for Baldur's Gate's Backgrounds are clearly modelled after Magic: The Gathering's Partner mechanic, letting you place multiple cards in your command zone
It works really well for, say, Dark Magician Girl the Dragon Knight, but at the same time, there are a lot of combos that this card doesn't get to fulfill due to its Dragon (non-Spellcaster) type - namely, Magical Exemplar combos
Besides the original effects of the Seal, once per turn, the player gains 500 life points for each monster that they have on the field