Horror Chase Designer

Design a chase the player survives by a hair, and only sometimes.

What a chase is

A chase is a map, a pursuer with rules, and a set of routes whose odds the designer knows and the player does not. The classic shape: lure the pursuer into a room, hide under the bed, wait until it walks to the far side, slip out the other way — timed so that it just works, and only if you read the room right. Most routes fail. One or two succeed. The player must brush past the thing to make it.

This skill designs the odds first, then the monster.

What the user gets