Help How to make a self-collecting growing blob?

[MokhovDmitry]

What I mean: I need to control the Blob, that rolls around the map and grows up in size everytime it absorbing other blobs. Time to time the Blob will meet on the way obstacles, that makes him to fall apart, but after passing the obstacles, all its parts should come together again in one big blob. Yeah, like "Liquid metal" did in "Terminator 2"

So, I need some advices from developers: how would you implement this mechanic using your asset? 

For this moment, it looks like: https://gyazo.com/60a6610a9cee40d976cf6149f7b6b6bc


Settings of emitter and solver in attachments