Recreating this effect

[Domokun]

How would one go about creating this effect? (video attached - https://drive.google.com/file/d/1R2xf1Xa...sp=sharing) I've gotten pretty close by using a position object/icon, then a find target and collision. What I can't seem to nail is that the particles seem to either scale or intensify as they get closer to the surface (bright white area in the video). They seem to almost elongate as they are sucked in. I have tried sing SPAWN but that does not seem to do it. 
Thanks in advance.
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