Arsinoitherium
Starting Statistics
Size Medium; Speed 30 ft.; AC +4 natural armor; 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 Advancement
Size Large; AC +2 natural armor; Attack gore (2d8); Ability Scores Str +8, Dex –2, Con +4; Special Qualities powerful charge (gore, 2d8), trample. it gives it a regular attack with a gore of 2d8.