Gruul is indifferent to the rise and fall of mortal power in the Blade's Edge Mountains. As long as mortals continue to pay him tribute, Gruul will not intervene in their battles with each other.

Once foreign enemies invade, for the sake of tribute, Gruul is willing to stand at the forefront and bear the pressure for all the creatures in Blade's Edge Mountain.

Just like when Saberian led the black dragon to invade.

From this perspective, Gruul is indeed a qualified boss.

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