The Constellations Are My Disciples is a Manga/Manhwa/Manhua in english language, manhwa series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

300 years ago, Martial God Hyun-oh Kim defeated Barche, the boss of the tower of destruction, and prevented the end of the world. Kim Hyun-oh, should have died suffering the same fate as the tower of destruction. However, after 300 years, he is reborn as the 17-year-old Kim Joo-hyuk. In the midst, he finds out that the “Constellations”, that were created during his absence, are his disciples from 300 years ago and sets on a journey to find them.