Are you the clay from near Lake Pontchartrain (in GK1)?
Here's why I think so:
1. GK1 is your favourite GK.
2. "...left quite an impression..." Gabriel uses you to create one.
3. "The truth will become muddy" ... Gabriel gets the clay from within the mud near the lake.
4. "it's what you will have to do, even if things get bloody" ... Gabriel gets an impression of the silver snake amulet. There only one other amulet in the game -- the Schattenjager amulet -- and in Gabriel's dream, blood gets splashed on it.
5. Finally, people once - and still do - build with clay. (Granted, they used to build with sun-baked clay; now they use special ovens to fire the clay, which becomes as hard as concrete). There's the 'concrete evidence'!
