Scroll of the Hidden Killer

 is an enchanted scroll that conceals the user while simultaneously increasing Marksman and Sneak skills.

Effects
All effects are for 60 seconds on self:
 * Chameleon – 50 to 80 points
 * Fortify Marksman – 100 points
 * Fortify Sneak – 60 points

Inscription
This scroll's inscription reads:

WOE UPON YOU

Acquisition
Only one Scroll of the Hidden Killer can be found. It is located on a table near Afer Flaccus in Raven Rock (cell -25,19).

Additional scrolls can be obtained on the PC by using the console: Player -> AddItem "sc_hiddenkiller" 1

Trivia
A second (and identical) version of this scroll can be found in the game's Construction Set (item ID: sc_Chappy_sniper_test). Chappy refers to an NPC named "Chappy's Test guy" that also exists in the Construction Set but cannot be found in the game.