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Next I'll play from my hand, the spell card, Gathering of Sirens

Because if you were to use this card in a deck, you wouldn't use more than 1 and you would want to use it as a starter type Pokemon getting it into the active Pokemon spot early in the game, then you could use Smokescreen the first turn and Slash after that, so even if your opponent couldn't attack their first turn, Smokescreen is really only stopping about 10 damage

Your store may even have Final Fantasy Sleeves for sale

During the End Phase of the turn you activated this card, each player takes 300 damage for each card in their hand

In the 2nd Stage, DP is earned by winning Duels

However, considering that none of these cards technically need each other, I wouldn't run any Level 1 Xyz in here at all