try study some LFO, thats how you add wobble

What synth(s) have you been using to recreate it? Sounds to me like they were using FM synthesis for it, you can really tell at like 0:38 when the modulation gets higher.

I just spent like 15 minutes with Operator in Ableton and got something fairly close: https://soundcloud.com/achieve-escape-velocity/wob-for-blekalt/s-5Ocol

That's not the right notes/modulation but you should get the idea. With some distortion, EQ, and other effects it would prob sound a bit more like Zed's Dead's wobbles. Let me know if you're feeling it and I can tell you how I made it!

Yeahh, it was a quick try. I think I got the general quality of sound just way less refined. I'd bet if you use an FM synth (Serum works) and just modulate one wave with another with the modulator up an octave or two from the operator, put a bandpass filter on it, and modulate both the FM amount and filter cutoff with the same LFO you could get pretty close (this is pretty much exactly what I did). From there you'd just need to mess with what wavetables you're using, the amount of modulation, and prob some saturation/small reverb etc to finish it off.

If you end up getting close you should post what you did!