Otherwise What's it Doing in a Graveyard?
We need to get in to the castle, as we suspect evil is afoot. We can't just wander in the main gate, as the evil involves reassigning all the guards and bringing in new people just prior to a massive feast for the nobility, which is pretty suspicious in itself.
We could enter the castle via the sewer system, which, after some investigation, we find to exit near a graveyard. Making our way there, we see that the graveyard is old and dilapidated, with a large, rusted, iron fence and gate, and lichen all over the gravestones.
'Hang on—is 'lichen' the plural of 'lich'?'