"Elemental HERO Neos" + "Neo-Spacian Flare Scarab"Must first be Special Summoned (from your Extra Deck) by shuffling the above cards you control into the Deck. (You do not use "Polymerization".) This card gains 400 ATK for each Spell/Trap Card on the field. During the End Phase: Shuffle this card into the Extra Deck.
Its a sad truth, but they are trash. Pure elemental hero deck is almost always better. It was a cool concept, but the best alien deck is definitely Graydles. Neo Spacians are fun, but Glad Beasts pulled off the contact fusing far better.
My favorite has always been Wildheart personally. They started ignoring the others as soon as Neos was revealed, and were only rarely paid attention to. Even Evil Heroes were overshadowed, mostly due to Neos cards.