Wrath of the Kaiju, pg. 180
Under the tutelage of the College of Hanabi, or through study of a treatise on their technique, you have developed the knowledge to infuse objects with simple magic. You gain the following benefits:
• Increase one ability score of your choice by 1, to a maximum of 20.
• You gain proficiency in the Arcana skill and with one tool of your choice.
• At the end of a long rest, you can infuse one Tiny or Small nonmagical object you touch with magic. That object becomes magical, and gains one of the following effects of your choice:
◊ Light. As a bonus action, a creature holding the object can cause it to shed bright light in a 20-foot radius and dim light for a further 20 feet. The light is coloured as you like when you infuse the object. Completely covering the object with something opaque blocks the light. A creature holding the object can use a bonus action to quench the light.
◊ Sound. As an action when you are within 30 feet of the object, you can cause it to emit a sound, ranging in volume from a whisper to a scream. It can’t replicate words, but it can replicate a scream of pain, a dragon’s roar, incoherent murmuring, the shattering of glass, birdsong, or other noises. The sounds can last for up to six seconds, and can be continuous, or you can make discrete sounds at different times over that time.
◊ Boom. As an action when you are within 60 feet of the object, you can cause it to explode, destroying the object in the process. Each creature within 5 feet of the object must make a Dexterity saving throw (DC = 8 + twice your proficiency bonus) taking 2d6 fire damage on a failed save, or half as much damage on a successful one. When you infuse the item, you can choose for the explosion to be silent, or emit a tremendous boom that can be heard up to 500 feet away.
The object you infuse with magic remains magical until it is destroyed, or until you use this feat to infuse an item again.