Homebrew
WONDROUS ITEM RARE MAGICAL METAMAGIC
Requires Attunement
When a spellcaster is attuned to the Mind Crystal, once per Long Rest you can choose to cast a spell that normally uses your Action with a Bonus Action instead. You can only cast one leveled spell and one cantrip on the same turn.
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 cast the spell roll a d20 and on a 1, it becomes a nonmagical gem worth 50 gp.
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