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"Another secret protection?" 

Merlin stared at Wizard Setoh in astonishment. Firstly, Merlin did not have to stay in a certain place on the battlefield. Secondly, he could choose whether to attack any time or not at all. Thirdly, he was under the protection of an Honored Legend as well as under the furtive surveillance of the four Great Lords. 

In other words, although Merlin was at the front line, he was extremely safe. After all, it was incredibly difficult for the Rock Tribe to track Merlin's whereabouts not to mention act against him? 

Nevertheless, it was of course, beneficial that Wizard Setoh valued Merlin so highly.