Superior Rune of Nightmare
that’s a wiki, people can change that or mistyped it.
(as stated at the site “The wiki is a perpetual work-in-progress that needs and welcomes your direct involvement to improve. Now that we have access to the game, join in with the effort! Correct inaccurate info; update old content taken from alpha/beta; create new content; use discussion pages to point out issues. Consult the elementary editing guide and how to help.”.
I think if there is something wrong with the runes it will be the “effect” not the stats it gives.
Choo Choo!!! – Eizenhailtz
I checked this, it was true. It can be easyly checked in the heart of the mist. Without rune of niggmare I has 10 ticket of poison, with – 12, thus it gives 20% condition duration.
So you think wrong.