Wilderlands Age of Worms
Anmor (Knowledge Dungeoneering: 35) shared the following information:
Carrion Crawlers are aberrations that typically live underground. When they are alive, their tentacles will cause paralysis. The giants of Kongen-Thulner are flinging Carrion Crawler heads at the dragons via their catapults in large sacks that appear to be designed to burst open upon impact. It is unlikely, however, that the creature’s paralysis effect continues after the carrion crawler is dead.