The arsinoitherium is a herbivore, but it displays a fierce and threatening behavior when it perceives danger: bellowing, stamping, and tossing its head. Threats that do not recede from such warnings are met with a fierce bellow and a Charge.
Starting Statistics: Size Medium; Speed 30 ft.; AC +4 natural; Attack gore (1d8); Ability Scores Str 14, Dex 12, Con 15, Int 2, Wis 13, Cha 3; Special Qualities Low-Light Vision, scent.
7th-Level Adv.: Size Large; AC +2 natural; Attack gore (2d8); Ability Scores Str +8, Dex –2, Con +4; Special Qualities Powerful Charge (2d8), Trample.