Here's a small example:
The Hill Titan Umstos Ospaznuspu Sesnum Xolang has come! An enormous scaly tick. It has a knobby shell and it has an austere look about it. Its aqua scales are oval-shaped and close-set. Beware its deadly spittle!What shall my dwarves do? Run and hide behind the defenses of the fortress, hopefully. Sadly, their track record with goblin hordes suggests that they'll mill around in a panic while many of them are slaughtered mercilessly by the titan. Eventually the military will defeat the titan...or not...in which case the fortress will be wiped out. Fun!
Addition: It turned out that the Hill Titan Umstos wasn't much of a fighter. Here's the latest "fun thing" to come along - possibly a great deal more problematic from the description:
The Forgotten Beast Cuthabe Vilelanunore Anayaimeri has come! A huge humanoid composed of steam. It has a curling trunk and it squirms and fidgets. Beware it's poisonous sting!Ooh! A forgotten beast! Yay!
Let's hope the fine dwarven soldiers of "City Kenzas, Whimcrystals" are up to the challenge.