# Mind Crystal *Wondrous item* ![](/Rules/Source/items/img/mind-crystal.webp#right) These gemstones contain a crystallized bit of spellcasting magic. Different types of mind crystals exist, each with a different single-use effect. When you cast a spell that has a casting time of 1 action while holding a mind crystal, you can modify the spell in a specific way. You can use only a single mind crystal to modify the spell, and you can't use a mind crystal and a Metamagic option on the same spell. Once you use a mind crystal, it becomes a nonmagical gem worth 50 gp. **Items in this group:** - [Mind Crystal (Careful)](/Rules/Source/items/mind-crystal-careful-pabtso.md) - [Mind Crystal (Distant)](/Rules/Source/items/mind-crystal-distant-pabtso.md) - [Mind Crystal (Empowered)](/Rules/Source/items/mind-crystal-empowered-pabtso.md) - [Mind Crystal (Extended)](/Rules/Source/items/mind-crystal-extended-pabtso.md) - [Mind Crystal (Heightened)](/Rules/Source/items/mind-crystal-heightened-pabtso.md) - [Mind Crystal (Quickened)](/Rules/Source/items/mind-crystal-quickened-pabtso.md) - [Mind Crystal (Subtle)](/Rules/Source/items/mind-crystal-subtle-pabtso.md) *Source: Phandelver and Below: The Shattered Obelisk p. 218*