Whenever your planet positions are going through the Ketu Mahadasha period then the consequence of Ketu Mahadasha will result as follows:
It’s got a serpentine head. The regular human head is cut away. It is tall and gowns in smoke-colored garments that are grey and can be tamasik. Its vehicle is a serpent.
It is by nature a planet. Otherwise, under the effect of any other planet, it acts just like Mars.
Its compatibility with some other planets is as follows:
• Favorable with Mars, Venus, Saturn
• Neutral to Mercury and Jupiter
• Inimical to Sun, Moon
It is the KARAKA for Witchcraft, difficulty to enemies.