This shield looks to be that of any other shield at first glance, save for the intricate carvings of a fierce, front-facing lion that adorns its front. In the center, and in the place where the lion's pupils sit in the carvings, three large sockets lay, that are shaped to house gems. The two eye sockets can fit a gem at least 1,000gp, and the center socket can fit a gem worth at least 5,000 gp.

While wearing this shield and not attuned to it, it gives the wearer the standard +2 bonus to their AC, as any shield would have. While no gems are inserted into the sockets, it is impossible to attune to this shield.

While attuned to the shield, the wearer gains an additional +1 bonus to their AC equal to the number of gems inserted into its face. The shield also shrouds itself in abjuration magic, and grants the wearer resistance to the damage type that corresponds with the gem inserted, as listed below. If all three gems are of the same type, it grants the wielder immunity to the damage type while attuned to the shield:

The type correspondence to gem types are as follows:
-Ruby--Fire
-Sapphire-Cold
-Topaz-Lightning
-Emerald-Acid
-Amethyst-Poison
-Jasper-Thunder
-Diamond-Radiant
-Jet-Necrotic

Shields require the Utilize action to Don or Doff. You gain the Armor Class benefit of a Shield only if you have training with it.