Can someone explain how this witchcraft sound was made?

The magic for me is the preset No Delay from Uncanny Valley Sound Pack. I am fairly new to FM synthesis and I don’t understand why this preset has this delay effect with pure oscillators.

Not at home atm, but I’d guess it’s one of the LFOs with ramp/exp curve assigned to amp/overdrive?

Neither do I. I’ll check that later.

Thanks.