"Why didn't you tell me that before?" you ask the unicorn.
"The unicorn tosses his head and replies, "I thought it only
had effect on the Tremor trolls and the Gnalish
Dwarves."
nothing but the sky! Then you realize you can see a dim outline of
your face if you stare hard enough. "I'm almost invisible!"
you say. The unicorn agrees. "I knew the waters of this lake
had odd effects on some creatures, but I've never seen anything so
dramatic before!"