Lin Feng and the Crimson Gorilla Grand Sage's superior eyesight could naturally discern that the Monkey did not employ an illusion spell when he transformed into a White Jade Dragon just now - he actually became a living, breathing White Jade Dragon in that instant, a White Jade Dragon whose strength level has reached the Vipralopa Stage.
After dragons complete the Cardinal Tribulations and ascend to the Vipralopa Stage, they undergo drastically different transformations from other demon tribes. Regardless whether they are Azure Dragons, Yellow Dragons, Flame Dragons or White Jade Dragons, their blood turn pure and they morph into the most primal yet most powerful Immemorial Celestial Dragons.