By the end of World War II, the art of Seon-Gwan-Moo (also Sun-Kwan-Moo, Korean: 선관무; 禪觀武) was almost lost. In the years following the war, Yang-Ik (양익 대선사; 兩翼大禪師) reassembled the remains of an old Vajrayana tradition - Keum–Kang-Yeong-Kwan (금강영관; 金剛靈觀) and developed its current style.