Put the plain Discord Call just before this clip so the normal alert sets up the payoff, then follow it with a Vine Boom when the fake caller finally speaks. Keep this clip for the moment the prank peaks, rather than using it as a background alert throughout the edit.
About this sound
This 5.7-second clip is the familiar Discord incoming call sound with its low end pushed hard until it sounds booming and distorted. The effect feels sudden and absurd, turning an ordinary alert into a joke that lands because it is far more dramatic than expected. It comes from Discord's incoming call sound, a tone widely recognised in gaming and online chat.