Something appears buggy with this, as I should be getting nearly 2 hours duration per cast, and it's barely over 2 hours for 2:
Magic Item Use.....................| 304 204
Cloak of Shadows ................... 0:46:42
>rub pin
You rub your citrine quartz pin.
1d100: 9 + Modifiers: 173 == 182
Your mind's eye drifts to visions of vast, ancient libraries and you sense, with unnatural clarity, that you can clearly discern the arcane texts that once eluded you.
Cast Roundtime 3 Seconds.
>prep 712
Countless images of symbols and runes fill your mind as you begin to tap into the untold resources of magical knowledge at your disposal. The workings of the Cloak of Shadows spell linger in your memory.
A cool feeling washes over your forehead and a brilliant golden radiance surrounds your hands as you prepare Cloak of Shadows...
Your spell is ready.
>cast
You gesture.
A shadowy patch of ether rises up through the floor to encompass you, swiftly sinking into your skin.
Cast Roundtime 3 Seconds.
>prep 712
A cool feeling washes over your forehead and a brilliant golden radiance surrounds your hands as you prepare Cloak of Shadows...
A strange shift in your mind causes a momentary episode of vertigo. When your eyes are able to focus, you distinctly feel the loss of your previous knowledge in the arcane arts.
Your spell is ready.
>cast
>You gesture.
A shadowy patch of ether rises up through the floor to encompass you, swiftly sinking into your skin.
Cast Roundtime 3 Seconds.
Cloak of Shadows ................... 2:57:16