Chapter 977: I'm Here to Fulfill My Promise.

The Heaven-Locking Ice Prison was a sealing secret technique passed down by the first-generation Grandmaster of the Trinity Sect since its founding. It was specifically used to seal powerful enemies, and was one of the hidden methods of the Trinity Sect.

Back then, the first Grandmaster of the Trinity Sect had used this technique to freeze a thousand miles of land, killing 300 cultivators, and spreading his reputation far and wide.

Since their apprenticeship, the Four Immortals of Profound...