what was the masterpiece of severino reyes that underscores the injustice of spanish rule around the cruel fate of the young lovers tenyong ang julia?

The masterpiece you’re looking for is “Walang Sugat” by Severino Reyes.

This sarsuwela is widely regarded as his finest work and is explicitly described as his masterpiece that underscores the injustice of Spanish rule while centering on the tragic, threatened love story of Tenyong and Julia.