You can Tribute Summon this card in face-up Attack Position by Tributing 1 "Fabled" monster. Once per turn, the effect of the first Normal Spell Card your opponent activates becomes "Your opponent discards 1 card". ("Your opponent" means the controller of this monster.)
They did a good job with this card explaining who discard. There was a dark world monster that did this type of effect when it was discarded. It special summoned itself to the opponent's side of the field then it made it's opponent discard a card it was DW ceruli.
I accidently called this card Fabled diarrhea once and now my friends call it that... ONE MISTAKE ONE! NOOOOOOOOO!