Magic Gem

I was bored and kept clicking that little gem down in the bottom right corner of the map editor by the scroll bars as fast as i could and muradin and an arch mage start taunting me, but still nothing happens when I push it, I dont know what its for, maybe im stupid but could someone tell me why the hell its there!??!

Yeah WTF is that thing??

1. Try hitting F12 when it's on
2. Try deleting units when it's on
3. Try clicking random heroes while it's on

The rest is hilarious. Perhaps there are more things it does?

That is pretty funny, thanks for telling me, though I wish it had a more usful aspect, oh well i will always have it on now!