The Yin Yang Sphere is a clear crystal with the a spherical yin yang symbol inside surrounding a rainbow like smoke effect on the inside of the crystal. 

The Yin Yang Sphere can become any weapon the player is proficient with. The damage of the weapon is how much health a player is willing to sacrifice. On a hit the enemy takes that much damage and the player receives none. On a miss the player takes the damage that they sacrificed. On a critical success the enemy takes 3 times the damage. On a critical fail the player takes 3 times the sacrificed health.

Notes: Focus on the crystal for one hour to become attuned.