After being defeated, it was sealed within a crystal

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I expect to see this one show up in a lot of techs, especially mono black where you tend to need a lot of colored mana
Notable exception: certain Reverse Holos from older or out-of-print sets can fetch significant prices, especially in high grade (PSA 10 / CGC 10)
Strategy The strategy for Spirit Charmers hasn't changed much since its last iteration in 2020, but now there are more tools to get you to your desired game state
Like most Pokmon TCG tournaments, the prize for competing and attending competitive events are special promotional cards, usually not seen anywhere else