Plays during Phase 1 of Nergigante's fight, unlike other elders, where the generic Elder Dragon Interception theme plays.
In Phase 2, a rock version of Proof of a Hero plays instead:    • Monster Hunter Now Proof of a Hero Ro...  

Nergigante will first only be accessible during the paid live event in Shibuya, Japan, on October 12th and 13th, and afterwards on the 16th during a global paid live event.

This theme is identical to Nergigante's World theme.