From Pathfinder Book of the Dead, which isn't enabled.

Zombie Mammoth

CREATURE 11

This monstrous creature can overrun defenses and stomp foes into the ground, making it a terror on any battlefield.

Simple to create and varied in purpose, these shambling undead are often used for their strength and endless stamina to conduct boring, repetitive tasks.

Perception +17; darkvision

Skills Athletics +24

Str +7, Dex +0, Con +5, Int -5, Wis +2, Cha -3

AC 27; Fort +22, Ref +15, Will +19

HP 290, void healing; Immunities bleed, death effects, disease, paralyzed, poison, unconscious; Weaknesses vitality 10, slashing 10

Severed Trunk

When the zombie mammoth is hit by a critical hit that deals slashing damage, the mammoth's trunk is severed from its body. Any creature Grabbed or Restrained with the trunk is released, and the mammoth loses its trunk Strike and Greater Constrict.

The trunk slithers across the battlefield, still animated, and acts in initiative right after the mammoth. It retains Greater Constrict and trunk Strikes but can't use tusk Strikes, foot Strikes, or Shambling Trample. It has all the stats of the mammoth, except its AC is reduced to 23, it has only 50 Hit Points, and its Speed is 10 feet. Damage dealt to the severed trunk has no effect on the zombie mammoth.

Slow

A zombie mammoth is permanently Slowed 1 and can't use reactions.

Void Healing

A creature with void healing draws health from void energy rather than vitality energy. It is damaged by vitality damage and is not healed by vitality healing effects. It does not take void damage, and it is healed by void effects that heal undead.

Speed 45 feet

Melee Tusk +24 (reach 15, unarmed), Damage 3d10+13 piercing

Melee Trunk +24 (reach 15), Damage 2d10+7 bludgeoning plus Improved Grab

Melee Foot +24 (reach 10, unarmed), Damage 2d10+13 bludgeoning

Greater Constrict

2d10+7 bludgeoning, DC 30 basic Fortitude

The monster deals the listed amount of damage to any number of creatures Grabbed or Restrained by it. Each of those creatures can attempt a basic Fortitude save with the listed DC. A creature that fails this save falls Unconscious, and a creature that succeeds is then temporarily immune to falling unconscious from Greater Constrict for 1 minute.

Shambling Trample

Large or smaller, foot, DC 30 basic Reflex

The zombie mammoth Strides up to its Speed instead of double.

The monster Strides up to double its Speed and can move through the spaces of creatures of the listed size, Trampling each creature whose space it enters. The monster can attempt to Trample the same creature only once in a single use of Trample. The monster deals the damage of the listed Strike, but trampled creatures can attempt a basic Reflex save at the listed DC (no damage on a critical success, half damage on a success, double damage on a critical failure).

Improved Grab

Trigger The monster's last action was a successful Strike that lists Improved Grab in its damage entry, or the monster has a creature Grabbed or Restrained

Effect If used after a Strike, the monster attempts to Grapple the creature using the body part it attacked with as a free action. This attempt neither applies nor counts toward the creature's multiple attack penalty.

The monster can instead use Improved Grab as an action and choose one creature it's grabbing or restraining with an appendage that has Improved Grab to automatically extend that condition to the end of the monster's next turn.

Pathfinder Book of the DeadOGL