Danger! Dogman!

You can reveal this card in your hand; your opponent randomly chooses 1 card from your entire hand, then you discard the chosen card. Then, if the discarded card was not "Danger! Dogman!", Special Summon 1 "Danger! Dogman!" from your hand, and if you do, draw 1 card. If this card is discarded: You can have all face-up monsters your opponent currently controls lose 1000 ATK until the end of this turn. You can only use this effect of "Danger! Dogman!" once per turn.