Disable the zombies one at a time, then finish them off

Hoping that if you get rid of the zombies the stench will also disappear you charge the nearest zombie. You easily dodge its pathetic attempt to attack you and cut off one of its legs, causing it to fall down to the stone floor. Wasting no time you do the same with the second and the third zombie.

Now that all the zombies can do is crawl slowly towards you they are no challenge at all. You quickly cut them to pieces and their remains vanish without a trace, leaving behind a small silver key. Sadly, and much to your disappointment, the stench remains.

After taking the small key you turn your attention to getting out of the room, and away from the horrible smell. You discover that there are now six stone doors leading out of the room. On the first one you see the engraving of a crown, on the second – the engraving of an arrow, on the third – a shield, on the fourth – a chest, on the fifth – a spear, and on the last door – a book. There are no hints what – if anything – the symbols mean.