Complex sentence: Shabkar Tsodruk Rangdrol, Dudjom Lingpa and the Fifteenth Karmapa Khakyab Dorje who was a student of Kongtrul and other lineage leaders gave their blessing to the movement and its founders who were considered extremely realized.
Split into simpler sentences: Shabkar Tsodruk Rangdrol, Dudjom Lingpa and the Fifteenth Karmapa Khakyab Dorje who was a student of Kongtrul. Other lineage leaders gave their blessing to the movement and its founders who were considered extremely realized.