Khusha wood is used for havana ceremony. The mantra to overcome obstacles due to afflicted Ketu is “Om Sram Sreem Sroma Saha Ketve Namah”
Ketu is the Lord of Descending/South lunar node. Ketu is generally referred to as a “shadow” planet. He is considered as Tail of the Demon Snake. It is believed to have a tremendous impact on human lives and also the whole creation. In some special circumstances it helps someone achieve the zenith of fame.