Wanted to do an experiment, so the last time a pack of seven wolves ambushed me, I just sat there and let them go at me. They bit and bit and bit, but my modded character was simply too strong for them: his body is made of an ultradense material, but since it's organic and has an absurdly high regeneration rate, they couldn't do anything other than annoy me. Then, a polar bear came along, and managed a few bites on my fingers that hurt a little. When I got bored, my character stood up, then went to town on them. It was over before they even realized my character could stand.
My modded character also discovered human civilization. I was a little sad when I discovered that there were no elves (apparently they were entirely wiped out by the Metal Wolves, my modded race and civilization, and their allies the goblins), but there's still humans and dwarves to play with (read: annihilate down to the last child, break said child's legs, then set fire to nearby trees and grasses so it can sit and watch him melt. Metal wolves are evil, and their civilization has only one rule: ANYTHING GOES). One town down, nine to go before this civilization is eradicated. Once the elves and dwarves are gone, I shall have to remove this world and it's modded creatures. I've pretty much got adventure mode down pat, so there's no more need to godmod anymore. One thing I did learn, though: there is no such thing as too powerful, but even the most powerful species will die from a one Z-level drop.