Common name: Arthropluera
Species: Arthropluera felsanguis
Time: Early Permian
Diet: Carrion Feeder
The fact that this creature even exists is enough to give me nightmares. Like the Island's other arthropods, Arthropluera Felsanguis has become much larger than I might have believed possible. It's a very aggressive hunter but greatly prefers to eat meat after it has spoiled, so much so that it voraciously seeks out such delicacies. Arthropluera's blood has a very low pH, to the point that it can dissolve many materials. This acidic blood splashes back onto anything that directly attacks it, weakening the durability of melee weapons and hurting attackers. Many creatures thusly refuse to prey on Arthropluera, fearing this unique defense. If that wasn't enough, Arthropluera also keeps a small reservoir of blood ready to spit at its prey.
Like most of the Arthropods on the Island, Arthropluera is simple-minded and relatively easy to tame. It is an almost entirely military mount, useful mostly for attacking at a distance. Thanks to its unique defenses, whether hunting or warring, Arthropluera is generally safe from all but the largest of creatures.