Marvel Rivals

This achievement is fairly simple, and is one of the easier character-specific achievements in the game. As it says, you just need to hit four players with Moon Knight's ultimate ability. Thankfully it's just hit and not KO. This is easiest done in the Domination game mode. Wait for most of the enemy team to hold the point and then call it in when you think you can hit four players with it.

If it helps, wait until the enemy team is trying to take the point from you, because then they will more than likely be grouped up.

Keep in mind, achievements don't pop until the match is over, but if you've managed to hit four players with the ability by the end, it'll pop up on the MVP screen.