phantasmal booster box "NEW" Opening Pokemon Mega Evolution Flames and both Pokémon prepare to attack Best Pokémon TCG Phantasmal Flames

This mark means a card is from the first print run of a card set, and that adds value and scarcity

So, let's say that this card suddenly gets an Errata and now prevents both players from Special Summoning anything from the Extra Deck (Synchros, Xyz, Fusions and Pendulums )

Manufacturer: The Pokemon Company Int'l A Burst of Bravery with Mega Lucario ex

If this card is banished and you control a Pyro monster: You can Special Summon this card, and if you do, it gains ATK equal to the number of your currently banished monsters x 100 until the end of this turn

Level Ball

As a result, they wipe out the opponent's creatures, limit a foe's opportunities to attack, or flat-out counter their spells to slow the game down