I've used Quintessence on an Elite shrieker, and in the opponent's turn it got poisoned. Yes, immortalizing preceded poisoning. One possible cause of this glitch could have been that just after immortalizing and before poisoning, I've accidentally burrowed the shrieker. After I've unburrowed it, checked some other website, and when I got back, it already had the poison counter. Anyone has ever experienced similar things?