Orc Invasion...

A boulder reeking of a stench from an unknown place
This is a large and very heavy boulder. The worst part about holding it would
be handling the stench. It is large enough to fill a rather big hole.
This item is in excellent condition.
It looks heavy.

A deep, dark, smelly hole in the ground
block hole with boulder
Seed places a rather large boulder into the hole in 
the ground, blocking access in or out by orcs.
Shortly, a magical force envelops the area and both the
rock and the hole disappear.
You get a small reward of 5 mithril coins for finishing this event.

Nice little mini-event I suppose, mildly entertaining 10 minutes..