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Vernusylph of the Flourishing Hills X EARTH Level 4 [ Fairy / Effect ] ATK 200 DEF 2000 "Vernusylph" monsters you control cannot be destroyed by card effects

It also doesn't have the usual effect of exiling the card after use, which is nice

Next, he played royal decree which protected his cards from traps and also pulled out the Labyrinth Tank the turn after with Riryoku(which powered it up to 3850 or about that(I knew it was the tank as soon as he moved it on the Labyrinth)

This deck can almost survive with no other creatures

Whether it be making tons of Squirrel tokens, utilizing your Squirrel creatures for other uses, or turning your Squirrels into an overwhelming force, theres a heavy focus on the creature type