All the boss tracks were composed by Carlos Viola
Timestamps:
0:07 - Warden Of The Silent Sorrow
2:34 - Ten Piedad
6:44 - Tres Angustias
12:02 - Our Lady Of The Charred Visage
16:08 - Perpetva and Esdras of the Anointed Legion
19:45 - Exposito, Scion Of Abjuration
22:59 - Melquiades, The Exhumed Archbishop
27:27 - Quirce, Returned by the Flames
31:10 - Crisanta, of the Warped Agony
34:22 - His Holiness Escribar
38:23 - Last Son Of The Miracle
Outro Music:
Keeper Of The Hammer - https://www.youtube.com/watch?v=yB1rg7cAI1M&t=2s