Venus is the Lord of Tula or Libra. If your Lagna or ascendant falls in this Lagna your Lagnadhipathi or the lord of lagna and 8th house Lord is Venus. The fourth and fifth house Lord is Saturn and He is the Yogkaraka for this Lagna and considered as the auspicious. Mercury or Budha is the ninth and twelfth house Lord and also is considered the auspicious planet for this Lagna. Being the Lord of Ninth and great friend of the Lagna Lord Mercury is beneficial for this Lagna. The second house Lord and the seventh house Lord is Mars and owing to his enmity to Lagna Lord Venus is supposed to be malicious planet for this Lagna. The third house Lord and sixth house Lord is Jupiter or Guru is the enemy of Lagna Lord Venus and is considered and malefic for this Lagna. Chandra or Moon is the Lord of 10th house and being the neutral planet is neither malefic or beneficial for this Lagna. Sun is a natural enemy to Venus the lagna lord and being the Lord of 11th house is Malefic for this Lagna. Rahu who is taken as Saturn is beneficial and Ketu who is taken as Mars is malefic for this Lagna.
VRISCHIKA LAGNA
Mars as the Lord of Vrishchika or Scorpion. Mars is the lord of Vrischika or Scorpion. Being the Lord of first house and sixth house he is the Beneficial Planet. Jupiter is the Lord of the second house and fifth house is the beneficial planet for this Lagna being the Great friend to the Lagna Lord Mars. Sun or Surya is the another beneficial planet for the Lagna being the best friend to the Lagna Lord Mars and also the Owner of house ninth. Chandra the friend of Lagna Lord Mars and the Lord of tenth house is also beneficial Planet for this Lagna. The third and fourth house owner Saturn is the most malefic planet as he is the great enemy to the Lagna Lord Mars. The seventh and twelfth house Lord Venus is also malefic to this lagna owing to the ownership of malefic house 12 and also owing his great enmity to the lagna Lord Mars. Mercury is another malefic planet for this lagna being a great enemy to the lagna lord and his ownership to the malefic house eighth and eleventh house. Ketu is beneficial for this Lagna as he is considered similar to Lagna Lord and Rahu is inimical for this Lagna as he is similar to Saturn or Shani.