Sextellegers

The sextelleger is easily one of the most dangerous plant-animals of Mars.

Description
Looking like a cross between a rhinoceros and a dinosaur, these beasts are truly dangerous apex predators, as they attack instantly, boasting high speed, armour and very sharp teeth that can cause gaping wounds. They also are extremely durable in battle. One should therefore think twice before attacking a sextelleger, which is found in the Martian wilderness.