that is normal, your oponent played book of exalted deeds and sacraficed it to put a counter on his faceless haven. The counter says: you can´t loose the game and your oponent can´t win the game. The bug is, that book of exalted deeds should be banned, but is unbanned since the new patch. With the combo he played you can softlock the game because there is no land destruction in Standard right now.
that is normal, your oponent played book of exalted deeds and sacraficed it to put a counter on his faceless haven. The counter says: you can´t loose the game and your oponent can´t win the game. The bug is, that book of exalted deeds should be banned, but is unbanned since the new patch. With the combo he played you can softlock the game because there is no land destruction in Standard right now.