Hey, I was using a water deck, I had chyo..sor..as... the clam that poisons the opponent, and i noticed later when I was about to lose against the enemy I had 5 Poison damage on me, but I don't think the Time Scarab/Pharaoh deck has any poisoning ability its like it appeared 2 turns before he was about to lose to make me lose.
I really can't think of any way I could have been poisoned by him so I think it must be a bug :\