Forum:Question???

I for got the name of that card is something mist its a trap and your opp. hand size can only be 5 but lets say you activatethat at the start of the turn lalalala he does his turn and he has lets say 4 cards in his hand and 3 monsters faced up and then i activated book of eclips b4 his turn ends. he flips his monsters faced down and then back up and draws 3 cards he now has 7 does he have to discard them b4 his turn ends? because book of eclips says he flips them back faced up and draws cards at the end of his turn?