Throw something at the glass bottle on the desk.
From Create Your Own Story
You find a small crystal sphere at your feet. You pick it up and chuck it at the bottle. It and the bottle both shatter. The orange liquid spills onto the desk and floor. as the liquid flows out of the bottle you hear a growl just like a tigers comming from the bottle.
You realise it's a tiger transformation potion!
Wondering why anyone would have tiger transformation potion in a glass bottle on their desk, you:
