Place it right after the losing moment, between an opponent reveal and your comeback line, to bridge the defeat and the next play. Pair Enemy Spotted first to flag the threat, then follow this clip with Nope when you refuse the rematch.
About this sound
This 1.9-second clip is the growling grrr from Clash Royale's Angry King emote, a short, exaggerated vocal burst that sounds more silly than threatening. It lands as a cartoonish flash of frustration, perfect for a lighthearted meltdown rather than real anger. It comes from Supercell's mobile strategy game, released in 2016, where players send the emote during matches.