2 or more "Cyber Dragon" monsters

A Fusion Summon of this card can only be done with the above Fusion Materials. When this card is Fusion Summoned: You can target Spell/Trap Cards on the field, up to the number of Fusion Materials used for its Fusion Summon; destroy them. Once per turn: You can send up to 2 LIGHT Machine-Type monsters from your Deck to the Graveyard, and if you do, for each monster sent to the Graveyard, this card gains 1 additional attack during each Battle Phase this turn.