hi,

so the story I'm looking for is older than 5 years.
most likely Sam/Dean
somehow they end up with a mental link/bond but don't quite know what it is because one of them thinks in words the other in images and as a result it is confusing and not quite clear but they eventually realize what is happening.
I think John was in it.

i really hope someone remembers this, as its quite old. so,
thanks in advance!

Edit: thanks for finding it so quickly! Link's in the comments.