Escarageo

 

    Escarageos are underground humanoid monsters which resemble both gorillas and beetles. After acquiring a territory such as a network of tunnels or caves, they start to accumulate debris: garbage, carrion, feces, mushrooms and metal items are put together into a ball as large as the creature. This becomes a nest and feed for its larvae. Escarageos push the ball while patrolling their territory and even use it as a weapon, crushing intruders that then are added to it. They also attack with strong arms and metallic mandibles which cut like a giant scissor. Its exoskeleton is also reinforced with metals. Both this and the mandibles can be used as weapons and armour, while the ball might have valuables.

Escarageo
Large monstrosity, unaligned
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Armor Class 16 (natural armor)
Hit Points 94 (11d10 + 33)
Speed 30 ft., burrow 20 ft.
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  STR     DEX     CON    INT     WIS     CHA
20 (+5) 13 (+1) 16 (+3) 3 (–4) 10 (+0) 10 (+0)
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Senses darkvision 120 ft., tremorsense 60 ft., passive Perception 10
Challenge 7
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• Tunneler. The escarageos can burrow through solid rock at half its burrowing speed and leaves a 5 foot-wide, 8-foot-high tunnel in its wake.
• Ball-nest. This Large object has AC 14 and 40 hit points. If destroyed, the  escarageos loses its ball trample attack and becomes enraged, gaining resistance to bludgeoning, piercing, and slashing damage, and it also can’t be charmed or frightened. The escarageos can create a new ball in 48 hours, at which point it will no longer be enraged. As a bonus action, the escarageos can move up to its speed toward its ball. While in possession of the ball, the scarageos has half cover (not included in the AC above).

Actions

1. Multiattack. The escarageos makes three attacks: two with its fists and one with its mandibles.
2. Fist. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 9 (1d8 + 5) bludgeoning damage.
3. Mandibles. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 14 (2d8 + 5) slashing damage.
4. Ball trample. The escarageos throws its ball in a 30-foot line that is 10 feet wide. Each creature in that line must make a DC 14 Dexterity saving throw, taking 33 (6d10) bludgeoning damage on a failed save, or half as much damage on a successful one. It must be near its ball again to make a new ball trample attack.