magic ice age booster box MTG - Ice Age is the first set in the Ice Age Block (Ice Age Booster Pack | Ice Age

send as many cards on the field as possible to the GY, then Special Summon as many "Crystal Beast" monsters as possible from your GY, up to the number of cards sent from your opponent's field to the GY by this card's effect

Theres other identifying features beyond the pixels

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Combining Keldeo-GX, Float Stone, and Eelektrik, Bristow was able to retreat Rayquaza each turn, attach a bunch of energy, and then send it back out onto the battlefield to deal damage again