This sturdy band of mithral is set with tiny sapphires.

While wearing a ring of soulbound protection, you gain a +1 deflection bonus to AC.
In addition, the ring serves as a receptacle for your essentia, much like a soulmeld does. Every point of essentia invested in the ring increases its deflection bonus to AC by 1 (up to a maximum bonus of +3).
Each ring of soulbound protection has an essentia capacity. The maximum number of essentia points that can be invested in it equals this value or your normal essentia capacity (MoI 19), whichever is lower.
A ring of soulbound protection (set with two sapphires) has a maximum essentia capacity of 2.

Prerequisites: Forge Ring, shield of faith, essentia pool 2.
Cost to Create: 5,000 gp, 400 XP, 10 days.