Avarandis's Spell Stone

You touch a stone and store a spell inside of it. The stored spell cannot be higher than 5th level and must have a casting time of one action. Storing this spell uses the spell slot you would normally use to cast the spell. The stored spell cannot be an attack spell. Anyone who possesses the stone can use an action to cast the spell with a successful DC 10 + stored spell level Arcana check. When the spell is cast the stone becomes inert and the spell ends.