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.