Armor Class 12
Hit Points 2 (1d4)
Speed 30 ft.
Senses darkvision 30 ft., passive Perception 10
Languages telepathy 30 ft. (emotions only)
Challenge 0
Shared Telepathy. Any creature touching the cranium rat can use the rat's telepathy if the rat allows it. If the creature knows any language, the creature can use the telepathy to communicate words and emotions.
Telepathic Shroud. The cranium rat is immune to any effect that would sense its emotions or read its thoughts, as well as to divination spells.
Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 1 piercing damage.
Illumination. The cranium rat sheds dim light from its exposed brain in a 5-foot radius or extinguishes the light.
MPP, p. 22