Hollow Knight boss fights compilation, but soundtrack from Castlevania

I little confused, but like the result. 0:00 - Hollow Knight 1:00 - Zote 2:15 - Soul Tyrant 4:14 - Lost Kin 5:24 - White Defender 6:36 - Hornet 7:14 - Mantis Lords 9:17 - Nailmasters Brothers 10:35 - Great Nail Sage Sly 11:50 - Pure Vessel 13:13 - The Radiance 16:12 - Guess who?