| Text | This flickering crystal holds the essence of an Outer Plane. As an action, you can attach the shard to a Tiny object (such as a weapon or a piece of jewelry) or detach it. It falls off if your attunement to it ends. You can use the shard as a spellcasting focus while you hold or wear it.
Roll a d4 and consult the Outer Essence Shards table to determine the shard's essence and property. When you use a Metamagic option on a spell while you are holding or wearing the shard, you can use that property.
Outer Essence Shards:
d4 | Property | Shard
1 | Lawful | Outer Essence Shard (Lawful)
2 | Chaotic | Outer Essence Shard (Chaotic)
3 | Good | Outer Essence Shard (Good)
4 | Evil | Outer Essence Shard (Evil)
Source: Tasha's Cauldron of Everything p. 133 |