No Treasure

A chest of random junk appears. As you
approach the chest, the stuff inside randomly
changes shape over & over again. If you open
the chest, the stuff inside will stay that shape
permanently. To open it at the perfect time,
you must make a Basic speed & perception roll
of some sort. Otherwise, your timing is off &
you open it a second late, leaving it turned into
the next random thing. Items are Minor-Basic.