The Gods' true bodies were typically gigantic and strong. This was the end result of receiving so much power of belief from their worshipers, as well as a natural result of having tremendous power.
Although there were also those who had small sizes with tremendous power, those were only special exceptions. In most situations, the strength of a God could be easily determined by their physical appearance.
Those who were absolutely gigantic, seeming like they could change the entire world just by standing there, with very powerful auras, and perhaps even their own background music, would definitely be a major boss.
However, Anslo's arrival was quite silent, and even pitiful.
If one decreased his size by many times, he actually appeared like a middle-aged elven scholar. He always held a scroll in one hand and a sword in his other hand, which was supposed to represent how he was at the peak of the world in both wisdom and physical strength.