Trying to identify video

I saw some video on Twitter a few days ago of a psyker and space marines getting killed by a time stopping 4 armed jester with no face. I was wondering if anyone here knows what actual media/game/show that is from? I don’t know if it was slaanesh or some other chaos. I only played the space marine game with Titus (new one) and total wars… if anyone rings a bell would appreciate