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Ice Barrier X TRAP When an attack is declared involving your opponent's monster: Change that opponent's monster's ATK to 0, negate its effects, also it cannot change its battle position

A card that deals 500 points of effect damage now does 250)

Serperiors ability makes every Grass Energy worth two Energies instead of one

Things to be careful of: Solemn Warning (summon negations) and cards that chain to his effect (Yuki, Veiler, Breakthrough Skill, etc.) A lot of decks have a very difficult time dealing with this guy unless they have those delicious chainables, so be careful for when those crop up

This a deck that has made a name for itself in competitive play and it shows