Must be Fusion Summoned. Gains 100 ATK for each “Neo-Spacian” and “HERO” monster in your GY. When this card destroys an opponent's monster by battle: You can add 1 Spell/Trap from your Deck to your hand that specifically lists the card “Elemental HERO Neos” in its text.
Search effect only activates when you destroy an opponent’s monster by battle, which can be slow.
Elemental HERO Neos has some great fusion spells you can use to summon Elemental HERO Brave Neos. Even costing you nothing except for the fusion card itself because the materials will be pulled from your deck/graveyard. Use Neos Fusion to make Elemental HERO Brave Neos using monsters from your deck as materials. By doing this you get to pitch any level-4 or lower effect monster out of your deck, which can be used later in the duel. Miracle Contact can let you Fusion summon with materials from your graveyard. This can act as retrieval for any level-4 or lower effect monster.
Load your graveyard with Neo-Spacian and HERO monsters to make Elemental HERO Brave Neos’ attack boost more significant. You can do this with cards like That Grass Looks Greener and Lightsworn monsters. You can use Future Fusion and target Elemental HERO Divine Neos to pitch a combination of 5 HERO and Neo-Spacian monsters.
Summoning this card alone, using a HERO or Neo-Spacian for the Effect monster material, means this card hits the field with 2700 ATK. If you combine this card with D-Hero Dangerous, you can get a lot of HERO in the Graveyard quickly.