Newbie Helper:
Welcome! Are you ready for a mission?
Have you seen the Gremlins around here? They've stolen the precious Blue Gemstone!
You must recover it from them!
Place your cursor over a Gremlin and click the left button. The cursor will change to a sword. Click the left button again to attack.
Before striking, to enhance the strength of your attack, use Soul Cry magic by clicking the F2 key. Click it again to turn off the magic.

You shall be well-rewarded for your efforts. Good luck.