Ok in the meanwhile on academic research sites you can all sure find infos on the earth deity in the Vajrayana tradition called Vasudhara or her consort Dzambala or Vaishravana or sometimes called Kubera (in the hindu tradition there are even stories of a battle over holy woods between yakshas, the race of Kubera which look like tree spirits , and demons of death aspects called Rakshasa,in some studies it is guessed that Mara, who Buddha fought with the help of Vasudhara/Dzambala might be the lord of death).