Added to Homebrews.
All sounds good.
Suggested body diameter?
Environment: Warm aquatic?
Organization: Solitary or colony (2-100)?
Treasure: x
Advancement: x
Monstrous Compendium Annual 4 said:The coral worm’s tube is covered with razor sharp ridges, 4 to 6 inches high and running several feet. Anyone coming into contact with these suffers 1d10 points of damage. The inside surface of the coral tube is pearly smooth. Coral worms might abandon their protective coral (where they are AC 0) to attack boats or swimmers.
freyar said:The line "If threatened, the coral worm can retreat into its tube, safe from all but the most persistent predator." suggests to me that it can't actually fight from within the tube. Would you agree with that?
When prey approaches the coral reef, the worms dart out to their full length to attack the prey
Coral worms might abandon their protective coral (where they are AC 0) to attack boats or swimmers.
That being said, I don't mind them being able to fight within their tube, but the tactics should indicate that is a rarity.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.