The material below is Open Game Content from a 3PP Source
This creature is larger than a normal elephant, with enormous sweeping tusks and shaggy brown fur on its body.
Mastodon CR 9 (XP 6,400)
N Huge animal
Init +1; Senses low-light vision, scent; Perception +24
AC 21, touch 9, flat-footed 20 (+1 Dex, +12 natural, –2 size)
hp 133 (14d8+70)
Fort +14, Ref +10, Will +7
Speed 40 ft.
Melee gore +21 (2d8+12), slam +20 (2d6+12)
Space 15 ft.; Reach 15 ft.
Special Attacks trample (2d8+18, DC 29)
Str 34, Dex 12, Con 21, Int 2, Wis 13, Cha 7
Base Atk +10; CMB +24, CMD 35 (39 vs. trip)
Feats Endurance, Improved Bull Rush, Improved Iron Will, Iron Will, Power Attack, Skill Focus (Perception), Weapon Focus (gore)
Skills Perception +24
Environment cold or temperate forests and plains
Organization solitary or herd (6–30)
The great mastodons are primeval cousins of elephants. Their large tusks dwarf those of regular elephants, jutting outward and then curving back toward one another at the tips. Shaggy woolly mammoths are a mastodon variant adapted to cold environments, but have the same statistics.
Starting Statistics: Size Medium; Speed 40 ft.; AC +4 natural armor; Attack gore (1d8), slam (1d6); Ability Scores Str 14, Dex 14, Con 13, Int 2, Wis 13, Cha 7; Special Abilities low-light vision, scent.
7th-Level Advancement: Size Large; AC +3 natural armor; Attack gore (2d6), slam (1d8); Ability Scores +8 Str, –2 Dex, +4 Con; Special Abilities trample (2d6).