Daily Puzzle #15 - Lyonbeast vs nihalsarin, 2020 SCC game 21

Can you find the move that @nihalsarin missed which might actually allowed him to make a down-4 comeback against @Lyonbeast?

Too lazy to put an image so there you go and also I found this in 10 secs and @nihalsarin has 20 secs left so idk why he didn't see it