Ebon Shard

Obsidian shards with void magic spells, causing psychic damage on failed saves.

Item type
Adventuring Gear
Subtype
Wondrous Item
Rarity
Very Rare

These obsidian shards are engraved with words in Deep Speech, and their presence disquiets non-evil, intelligent creatures. The writing on the shards is obscure, esoteric, and possibly incomplete.  

The shards give you access to a powerful array of void magic spells. You can cast the following spells (see Midgard Worldbook) without material components and using Charisma as your spellcasting ability.
At will: crushing curse 
3/day each: maddening whispers, void strike 
1/day each: living shadows 

Each time you use the ebon shards to cast a spell, you must succeed on a DC 12 Charisma saving throw or take 7 (2d6) psychic damage.

Source and licence

From Creature Codex.

Licence: Open Game Content (OGL 1.0a).

Every licence notice Tavern Bag relies on.