Sorry no pics, it was completely unexpected and all happened rather quickly... but here is the skinny...
Monitor brute law-giver, Ilu Ayiticuquimo.- A great skinless monitor twisted into humanoid form. It appears to be emaciated. Beware its poisonous vapors!
The heroic creature of legend, who tricked the human civilization into elevating him to position of law-giver. Despite my fears and the stories of rampaging demons who gleefully take the guise of diplomats and incite war, he dutifully watched my Mayor as he slept waiting to engage him in traditional blurry-eyed trade negotiations.
vs.
The desert titan Dostob Kikkirshigos. A huge three-eyed rove beetle. It has a fat, bulging trunk and it has an austere look about it. Its clear exoskeleton is rough and cracked. Beware its Fire!
This unenlightened monster managed to chase a woodcutter around my entire fort until he destroyed my little waterwheel/pumpstack waterfall machine! I'm a bit of a newb, so I was rather proud of that machine. Then he chased him into the back entrance of my fortress, despite it being the longest way into my fort and stepped over the couple traps set up just in case a goblin wandered in that direction.
I was unprepared for the sudden arrival of such an interesting human liason, and even more unexpected was the arrival of a titan soon afterwards.
10 of my poor dwarves were immolated or kicked to death, 5 of whom were military dwarves that despite all being in the same spot when ordered to attack, chose to gradually engage the beast one by one.
The last to fall was my Mayor, who gripped his steel warhammer(one of the few steel items in my fortress). and engaged the monster after one of its many legs kicked in the skull of a dwarven child I yelled at him to fall back!, but to no avail, my mayor was a dwarven child, just recently come of age... I had groomed him to leadership after he created an artifact at a very young age and he followed that up by becoming an expert farmer while still a child. His military training had just begun, but armed with a steel warhammer and silver artifact breastplate he was able to hold off the beast in the Noble housing section of my fortress. I have no doubt that despite numerous surface wounds to the evil beast that would have been the end of my fortress, except that he held the monster off long enough for the human's Law-giver to tackle him to the ground. The exchange between the two was mighty indeed (easily took up 30 pages of the battle report in just a few moments). Things seemed to be turning against the law-giver... although its always hard to tell with creatures of legend, he had a fractured lung and many internal and external wounds, but neither monster bled from any of them. But their combat did last long enough for at least a swordsdwarf and a wrestler to engage the monster and possibly turn the tide. The end was abrupt, somewhere between having a steel shortsword twisted in it while being bitten and latched onto by the law giver with everyone involved choking on the smoke and poisonous vapors the desert titan lost his thorax... apparently his only weakness.
There I was just minding my own business, wondering who was drinking up all the booze, when in comes a bit of worldgen craziness that ended up in a fight between two titans right in the middle of my fortress (named Princessswords). My tiny military consisted of about 10 dwarves, no one near legendary status, 5 of whom were only useful sitting on top of a 4 z-level tower shooting flocks of buzzards with bone bolts who harrassed my trade depot. Part of the problem was the military was gathered around the main entrance not knowing what to expect from the human liason who just entered, dwarves don't seem to like it when you tell them to station one place, and then follow that order up with another one telling them to attack another, they just decided to shoot some practice arrows and spar a little for the most part.