Mouse Dragon, Electrum (Draco Muridae Viridi)

Family: Dragon - Mouse

Tiny dragon, chaotic good

Armor Class 15 (natural armor)
Hit Points 31 (7d4 + 14)
Speed 20 ft., climb 20 ft., burrow 10 ft.

5 (-3) 14 (+2) 15 (+2) 10 (+0) 11 (+0) 12 (+1)

Saving Throws Dexterity +4, Constitution +4, Wisdom +2, Charisma +3
Skills Arcana +2, Nature +2, Perception +4, Stealth +6
Damage Resistances bludgeoning, piercing, and slashing from nonmagical weapons
Senses darkvision 30 ft., passive Perception 14
Languages understands Common and Draconic but can’t speak
Challenge 4 (1,100 XP)

Special Traits

  • Pack Tactics. The mouse dragon has advantage on an attack roll against a creature if at least one of the dragon’s allies is within 5 feet of the creature and the ally isn’t incapacitated.
  • Treasure Sense. The mouse dragon can pinpoint, by scent, the location of precious metals and stones, such as coins and gems, within 60 feet of it.
  • Underfoot. The mouse dragon can attempt to hide even when it is obscured only by a creature that is at least one size larger than it.


  • Multiattack. The electrum mouse dragon makes one bite attack and two claw attacks.
  • Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) piercing damage.
  • Claw. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 6 (1d8 + 2) slashing damage.
  • Lightning Breath (Recharge 5-6). The dragon exhales lightning in a 20-foot line that is 1 foot wide. Each creature in that line must make a DC 12 Dexterity saving throw, taking 27 (6d8) lightning damage on a failed saving throw, or half as much damage on a successful one.
Section 15: Copyright Notice

Tome of Horrors © 2018, Frog God Games, LLC; Authors: Kevin Baase, Erica Balsley, John “Pexx” Barnhouse, Christopher Bishop, Casey Christofferson, Jim Collura, Andrea Costantini, Jayson ‘Rocky’ Gardner, Zach Glazar, Meghan Greene, Scott Greene, Lance Hawvermale, Travis Hawvermale, Ian S. Johnston, Bill Kenower, Patrick Lawinger, Rhiannon Louve, Ian McGarty, Edwin Nagy, James Patterson, Nathan Paul, Patrick N. Pilgrim, Clark Peterson, Anthony Pryor, Greg Ragland, Robert Schwalb, G. Scott Swift, Greg A. Vaughan, and Bill Webb