For a film that arrived quietly and built its reputation through word of mouth, Eko has achieved something enviable. It refuses to fade. Just when the psychological thriller seemed to have settled into its post OTT life, actor Dhanush added a fresh jolt of validation.A rare shoutout from Dhanush sets the toneTaking to social media, the National Award winner called the film "a masterpiece" and reserved special praise for debutant Biana Momin. "Biana momin deserves all the highest honours. World class performance," Dhanush wrote in his Eko movie review.