5E Martians Attack! MONSTROUS BEETLE

This is the latest entry in a series of creatures I converted for Fifth Edition Dungeons & Dragons from Martian fiction. Patrons get access to all 24 Critters for $2/month or you can purchase the PDF here.  

This huge green bug has sharp snapping claws and a pair of vicious mandibles. 

Encephalons use giant beetles to burrow beneath the enemy and attack underground installations. They do have a weakness however in that they are vulnerable to fire attacks. 

Monstrous Beetle

Huge   monstrosity (insect, mutant), unaligned

Armor Class 20 (natural armor)
Hit Points 95 (10d12+30)
Speed 30 ft., burrow 20 ft.

STR | DEX | CON | INT | WIS | CHA     

20 (+5) | 10 (+0) | 14 (+2) | 16 (+3) | 10 (+0) | 2 (-4)

Skills Perception +4

Damage Resistances poison

Damage Vulnerabilities fire

Condition Immunities poisoned

Senses darkvision 60   ft., passive Perception 14

Languages -

Challenge 9 (5,000 XP)

Siege Monster. The   monstrous beetle does double damage to objects and structures.


Multiattack. The monstrous beetle makes two attacks   with its antennae and one with its bite.

  • Bite. Melee Weapon Attack: +7 to hit, reach   5 ft., one target. Hit: 14 (2d8 + 5) piercing damage.
  • Antenna. Melee Weapon Attack: +7 to hit, reach 10   ft., one target. Hit: 14 (2d8 + 5) slashing damage.

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