Tomi has a good point about them. Because of their general lack of body parts, especially limbs, Arena testing has shown them to be tougher little buggers to kill than their size would otherwise indicate. Assign a few as pets to military/hunter dwarves and they'll literally act as meat shields, soaking up a bite here and a gore there.
As for Deon's suggestion, I find them nesting in a dwarven colon a fun idea, but doubtfully possible given the current coding. Would make for a hell of a surprise if a goblin slices open Urist McWoodsdwarf, only to find the contents of the guts erupting out and attacking. I could give them a mild syndrome wherein they give the contacting creature millmetre worms, which burrow into the gut and cause mild nausea and perhaps some impared guts (should be fun to see what that does to a dwarf; it's not like it'll give them the runs or make them backed up).
If I combine the comments of Monk and katana, I come up with the concept of casting them. The average metre worm would be unchanged, but I could put in a 1/1000 chance of them being a massive killmetre worm. They could be roughly rhino- or elephant-sized, have a bite, and could be trained for war and mounting (cross this with Rhenaya's drow and watch as a squad of Drow come calling on killmetre wormback; a nice mental visual).
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Topic: [CREATURE] Metre worm (Read 1109 times)