Gustavus and Friends
This crystalline silver gem glows when you have advantage over your foes.
Price: 5,000 gp
Enhancement: +2 attack rolls and damage rolls
Critical: +2d6 damage, or +2d10 damage if you have combat advantage
Power (Daily): Free Action. Trigger: You hit a target that is granting combat advantage to you. Effect: You deal 2d6 extra damage to that target.
The Pantzers found the orb at the bottom of a shallow pool beneath Six Kings.