In the Substance of it

In the Substance of it is the twenty-fourth track (Disc 2 Track 7) in Halo: Combat Evolved Anniversary: Original Soundtrack.

Overview
The track features high strings and synth playing a suspenseful melody.

Halo: Combat Evolved Anniversary
The track does not play in Halo: Combat Evolved Anniversary.

Halo 2: Anniversary
The track plays in the campaign level The Oracle in Halo 2: Anniversary, during the cinematic in which Arbiter Thel 'Vadamee confronts the heretic Sesa 'Refumee in the hangar bay of the Threshold gas mine. In Halo 2, no music plays in the cinematic.