Vail's Eurypterid

The Vail's Eurypterid is a huge Arthropod, it looks very similar to a scorpion, but is extremely different. They are very dangerous and shockingly intelligent creatures, so intelligent in fact, they have been proven capable of learning languages. Although incapable of speaking any language, it is still quite a remarkable characteristic. Another thing about the Vail's Eurypterid is while they are typically solitary, they can be found in groups of thousands. The Eurypterids are much more aquatic than they are terrestrial, although they do fine on land, they are way more dangerous underwater. The Vail's Eurypterid reaches up to 50ft in length and averages at 10 tons. If this information wasn't scary enough these creatures, given several generations, produce a Queen. What one person would notice about the Vail eurypterid is its beautiful blue exoskeleton, which is rare to find among animals the Vail's Eurypterid is an exception to this rarity, they also have massive, sharp, red mandibles, it's hard to tell how many creatures this thing may have killed especially since its mouth is the same color as its victim's blood. Each of its four appendages that the Vails Eurypterid uses to move about has flippers that allow the creature to swim very effectively. It also has a large tail fan, this fan has 6 sharp spikes, these are what the Eurypterid uses to sting. The good news is these creatures don't usually bother messing with a player character unless provoked since most are too small to be its prey. However, these creatures do have a concept of friendship and are even somewhat tameable, if you attack a Vail's Eurypterid friend you are at risk of that Eurypterid going out of its way to kill you. Those who have had experience handling a Vail's Eurypterid will know that the key is to strategize and never fight one alone. This can give a very unique opportunity for using intelligence rolls.