PSY-Framegear Gamma (HSRD-EN031) [High-Speed Riders]

Cannot be Normal Summoned/Set. Must be Special Summoned by a card effect, and cannot be Special Summoned by other ways. During either player's turn, when an opponent's monster effect is activated while you control no monsters: You can Special Summon this card from your hand and 1 "PSY-Frame Driver" from your hand, Deck, or Graveyard, and if you do, negate the activation, and if you do that, destroy it. During the End Phase, banish any monsters Summoned this way.