Dogmole Juggernaut

Burrowed Tunnels. If the juggernaut burrows at half its burrowing speed, it can leave a 10-foot diameter tunnel in its wake.

Stout. The juggernaut has advantage on Strength and Dexterity checks and saving throws made against effects that would push it or knock it prone.

Relentless (Recharges after a Short or Long Rest). If the juggernaut takes 15 damage or less that would reduce it to 0 hp, it is reduced to 1 hp instead.

Multiattack. The dogmole juggernaut makes one Bite attack and two Claw attacks.

Bite. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) piercing damage.

Claw. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. it: 12 (3d4 + 5) slashing damage.

Wormkiller Rage. When the juggernaut takes damage from a Small or larger insectoid Beast, such as a giant centipede, or when it deals damage to such a creature, it enters a special rage for 3 rounds. While in this rage, it has advantage on attack rolls and Strength checks and deals an extra 5 (2d4) piercing damage with its Bite attack, but its Armor Class is reduced by 2. The juggernaut can't end this rage willingly.