For this effect, I created it for a game that I am currently working on called No Rail. My focus for this effect was timing and getting all of the various emitters and materials that I used to create my best attempt at the timing of a grenade. One thing I needed to ensure when creating this effect was to keep draw calls to a minimum since it is being used in a game.
Video clip of the FX in the engine
This clip from inside Cyberpunk 2077 was what I used for my reference