Bubble Burst

Using a small drop of water you can create up to four bubbles that you can place on any surface as long as it’s solid.  These act as beacons and will alert you should a creature walk within 5 feet of it or interact with the bubble, should a creature choose to interact with the bubble with a successful investigation check the bubble will burst and dispel instantly, notifying you mentally at any distance.

At higher levels you can create one more bubble.