Go to Sarum, can hunt earl to find it. In the Eagle Market is an eagle statue, bow statue. Make sure you get the blessing then head straight to the next location, it is timed.
Go to Caerleon and in a tavarn is a statue of a dragon, bow statue.
Go to Snowdonia, swnnu is a Celt, buy your essence, dragon/hydra/wyvern. You need one mark of Chivalry.
Go to Camelot, give essence Merlin. It does not need to be the Merlin under the moat.