The song has come up a few times in My Hero Academia anime, but recently during Fumikage Tokoyami vs Moonfish in season 3 episode 6, starts at 5:40 and ends at 7:20.
What's that song?
In case you haven't found it yet, the OST is called The Threat of Offence and Defence. It is from the 1st Season OST, here is the link.
