Once per turn, you can activate 1 of these Skills based on the face-up monster(s) you control: • "Elemental HERO": Discard 1 Trap, then add 1 Level 6 or lower Machine "roid" monster from your GY to your hand, then you can destroy 1 monster your opponent controls whose ATK is less than or equal to the added card's. • Machine "roid": Discard 1 Spell, then Special Summon 1 Level 6 or lower Machine "roid" or "Elemental HERO" monster from your Deck in Defense Position, but negate its effects. • Both: Discard 1 card, then Fusion Summon 1 Fusion Monster using only "roid" and • "Elemental HERO" monsters you control. Each of these Skills can only be used once per Duel.