The base is original from the producer (chords and melodies), but is complemented with elements that complement the song that come from samplepacks, usually, vocal chops, guitars, wobbles sections, glitch effects. It is the standard in which most of producers work, in a project you will find MIDI files made by the producer, but also melodic loops.
Really heavy sound design with some serum stuff and also mixing with some crazy samples.
Instrument BA Pad/Weird Fx
Sample pack Barely Alive Essential Samples/Disciple Samples - Virtual Riot x Modestep Spicy Riddim Drums Vol. 1
Loop name BRLY_ALIVE_150_synth_loop_they_Dmin/V_RIOT_MDSTP_bass_shot_philly_01