Core Rulebook
Mokuren are usually no larger than a cat, but they possess the ability to swell until they're the size of a bus (if only briefly). That ability, combined with their flashy pyrokinetic tails, make these creatures a particular favorite with children, at least in stories and picture books. Given that mokuren can "burrow" into paintings and other two-dimensional art, it's possible that some mokuren images are more than simple representations.
As images, mokuren can exist almost anywhere. They sometimes remain inactive without coming alive off a page for years or decades, until someone new comes along that the mokuren finds interesting.
Motive: Play
Environment: Almost anywhere, usually as static images on walls or in storybooks
Health: 9
Damage Inflicted: Minor wound (3 points), unless enlarged; see Combat
Movement: Short; long if flying
Modifications: Defends as level 5 due to size, unless enlarged; see Combat
Combat: A mokuren exists in three states: as an image, as a cat-sized creature, and as a bus-sized behemoth.
As an image, a mokuren can't be harmed. Even if the image is defaced, the mokuren merely 'burrows' away and reappears like graffiti on a new flat space within a few miles.
Alternatively, it could emerge from the image and become a physical cat-sized creature as a move. In this form, a mokuren can attack with its claws or bite. It can also direct a stream of fire from its glowing tail at a target within long range. (When a mokuren flies, it's by using its tail to create a jet that rockets it skyward.)
Finally, it can make an enlarged attack, in which it swells to the size of a bus and swipes at, bites, or lands on a target as part of the same
Action. When enlarged, the mokuren gains +5 to Armor and makes and defends against all attacks as a level 7 creature. On a hit, the enlarged mokuren deals 7 points of damage. However, a mokuren can remain enlarged for a total of only four rounds during any twenty-four-hour period, so it uses this ability sparingly or only when enraged.
Interaction: To see an active mokuren is considered good luck, unless you manage to get on the wrong side of one. Then an offering of sweets must be made to the offended creature. A mokuren can't talk, but it can understand the languages where it lives about as well as a trained courser or hound can.
Use: A mokuren can lead characters into unexplored areas, helping them find places they may have overlooked or skipped. It can also lead PCs into danger, but it usually does so only to bring aid (the characters) to someone else in trouble.
GM Intrusion: The character hit by the mokuren doesn't take damage. Instead, they must succeed on a Might defense roll or be pulled into the nearest wall, floor, or book with the creature, becoming a two-dimensional image. In this state, the victim is in stasis until the mokuren pulls them free, another creature 'pries' them loose, or a day passes and the effect ends naturally.