Elemental Hero Flare Neos (POTD-EN032) - Power of the Duelist 1st Edition

Elemental Hero Neos + Neo-Spacian Flare Scarab
This card can only be Special Summoned from your Fusion Deck by returning the above cards from your side of the field to the Deck. (You do not use Polymerization.) This card gains 400 ATK for each Spell and Trap Card on the field. This card returns to the Fusion Deck during the End Phase.