Making one more thread about how2make

In the track acceptance from Synkro the droney pad who start at the beggining and follow throught.
Here's the tune :
I know in a strict synth view how to make it. The notes are wided on the keyboard for more harmonics. Probably saw osc or/nd triangle. A blend or not. Eqing and so.
But then where i struggle is this eery feels. The reverb is the thing to me. But i tried and prettily hard. I can't get it as close as i want to this.
i tried resampling a pitched down sampled. resample only reverb tail. reverse and do a lot. I can usually make pad sound good but i can't make it sound like that.
I don't want to copy synkro in my tunes it's just for learning purposes.
I would love to have your thoughts on this
