Over Fusion
Target 1 face-up monster on the field; reveal 1 "Elemental HERO", "Neo-Spacian", or Level 10 monster from your hand, Deck, or Extra Deck, and the targeted monster's name can be treated as the revealed monster's if used as Fusion Material this turn. Send the revealed monster to the GY if you have "Elemental HERO Neos" on your field or in your GY, otherwise shuffle it back into its Deck (if revealed from the hand, shuffle into the Main Deck). You can only activate 1 "Over Fusion" per turn.