Every non-Core Set since Arabian Nights, released in December 1993, has an expansion symbol, though the changing of the color for rarity didnt start until Exodus, released in June 1998
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Includes six Mega Evolutions booster packs to broaden your collection
I could also see it as being an easy gateway into, or back into, the card game, since the way Arena can communicate information at a glance makes it easy to learn about all the new mechanics that have been introduced in the last few expansions
Magmortar is great at building up Energy so that its Flame Blast () can take one-hit KOs, but it is also great at staying behind in Prize Cards by using Fireball Bazooka () to spread damage around the opponent's board
Outburst allowed Living End and Crashing Footfalls to try and resolve their big effects on opposing turns