The Stone Slabs

After the man is finished talking you will see stone slabs appear out of the ground in various locations surrounding this statue, also found by the bridge on the other side of the spawn.

Each slab has a symbol carved/engraved on them. Match them up on both sides and then go back to the statue when you are done and he talks about being trapped between something.

Each tile from a side is paired with a tile from the other side. The objective is that two players stand on a pair to make it disappear. One player find a tile, and wait that the other player find it. While waiting, don't stand on the tile, as if two players are standing on different tiles the step will need to be restarted. 

NOTE: If you get a bad match, they will reset.