“Kobold sprites are originally found in German mythology, where they are invisible creatures that can transform into other shapes, such as a candle, a child, or even fire. These evil beings are equally as likely to do household chores as they are to murder entire households. Their malicious nature manifests in various forms throughout folklore, where they serve as servants of satanic or pagan cults, and possess a wide variety of powers.
In TTRPGs, Kobolds were reinvented as humanoids known for their skill in building traps and mining. The only similarities they share with their Germanic ancestors are their size and affinity for mining.”