I need help killing The Void Dragon This weekend, I will be having a game of 40k with my friend and I am very excited for my first game of 2021.  But there is one model in my friends necron list that I can't figure out a way to effectively deal with and that is of course, The Void Dragon.

The main problem with it is it's 3 wound a phase rule as no matter how much I try and think of something I can't kill it quick enough to be a problem for my army, (which I know is what a 350 point model should.

I will be using custodes as I dont have the new codex for my death guard and ,since it's on TTS, what is in the list is of no concern to me.

So any advice or strategy is very much appreciated to deal with what I believe is going to be a persistent thorn for my army.