Irritating.

Painful.

Quite honestly, this entire fiasco was becoming all too cluttered and all too frustrating for Overlord to keep his calm for much longer. At this point, he had been wounded and insulted. These things are quite uncommon to one of his stature, so of course he was becoming quite angry. As he lay there on the ground with his bony ironclad fingers tightening around the hilt of his sword, he thought aloud. "Why did I come here, again?" There was a short pause, as though he were waiting for someone to respond. "Oh, right. I was sent a letter. One that detailed how I would die. I have yet to do so, and I've been here long enough to kill an enhanced human." Again he paused, reaching into the hole that was once his chest cavity. "And usually those are the hardest to slay. So I'm assuming that I have been here for quite some time, I don't quite carry a clock with me everywhere I go."

Withdrawing his hand he saw an acrid blackish-brown fluid dripping from his gauntlets, his remaining organs had been liquefied. The fluid was noticeably oozing through the plates in his armor and onto the ground beneath him. Had the Overlord's lips still been on his face, there would have been the most gratified smile on his face. "Well, at least i have one plus from having someone damage my armor and body."

With a bit of effort he pushed himself back to his feet, staring down at the congealed puddle of his flesh and blood on the ground. "As long as it makes the ground moist, I can use it." 

Guess what happens when blood or liquefied organs soaks the ground?