I've been working on a new fort for a couple weeks. It's mostly in a "good" biome with some overlap into neutral. What can I say, my ears are just slightly pointed resulting in a disinclination towards Fun.
So anyway, two seasons in, I get the message:
The hill titan Ayilo Elifaotira Fidaleņemeni has come! A gigantic one-eyed mockingbird. It has two broad horns and it moves about carelessly. Its periwinkle feathers are long and broad. Beware its webs!
Uh oh.
This is the first time I've ever had a megabeast arrive at a fort, and the only time I've EVER seen a titan in any game mode but Legends.
Also, I recognize the name immediately: this is the "deity" worshipped by my (retired) adventurer. The humans have a temple to it!
So long story short, after sealing up the fort for a long time, watching this beast fly around the mountain tops doing nothing, recalling reading that titans won't necessarily attack in good biomes, and opening the gates only to have my legendary gem cutter (immigrated that way) maimed (he still passes out from pain every time he tries to take a drink, some 2 years later) and war dog killed, I decide the game is pretty much done and it's either time to abandon, or time for Fun.
So I assign every last dwarf to a squad and send them out after Ayilo (who is waiting for the jeweler to die so it can devour him? who knows.) I immediately reconsider this, and order the squads to form up at the trade depot first, before going on the attack. When everybody is in position, I go to order the attack, and Ayilo is not on the kill list. I'm confused. I can't find the monster either. Did it leave? I pull up the (u)nits screen, and it's ... Deceased? Whiskey Tango Foxtrot?
So I save the game and take a peek at gamelog.txt:
The Marksdwarf strikes The Hill Titan in the head from behind with his (copper pick), tearing the muscle, shattering the skull and bruising the brain!
And thus was the climactic end of the terrible reign of Ayilo, razer of hovels, destroyer of towns, embodiment of Nature.
Side note 1: This was year 113 (I tend to generate very young worlds, it appears to improve load times considerably) so Ayilo was probably much less powerful than it might have been in a more mature game. Also my adventurer had killed enough dragons, ettins, hydrae, etc. for the game to advance to Age of Legends, so I don't know if that weakens the Titans or what.
Side note 2: I built a coffin for my wardog, but by the time my dweeps got around to emplacing it, my militia commander (the owner) somehow managed to fall five Z levels and break his legs. And before anyone got a chance to bury the pup, the owner died of thirst in the hospital (I think it's time for Dwarf Therapist) - and the dog corpse seems to have lost it's "pet" status; my dweeps won't bury it..