Kraken

A giant sea monster. According to stories this huge, many armed, creature looked like an island when motionless and could reach as high as the top of a sailing ship's main mast with its arms deployed. The giant squid-like kraken are older than mortal races, huge towers of power, so huge that "jungles of kelp swayed through their limbs, and leviathans swam through bodies".The creature can regrow severed limbs within several days.