Agarwood, Oudwood or Oudhwood, is a complex and fragrant burnable wood, creating a warm home-like feeling for many, as well as creating an anxiety stress free atmosphere. It is also mentioned in the Bible, as Aloe wood.
This particular kind that we call "bat wing" comes from Indonesia, and is a cultivated variety. a hint of sweetness and notes of an almost pine-like smell, similar to what you would experience in a log cabin.
Oudwood is formed in the heartwood of Aquilaria trees when they become infected with a type mould (Phialophora parasitica).