Can you negate the action from Journey's End Keep with Footsteps of Madness?
Footsteps of Madness vs Journey's End Keep
A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
Can you negate the action from Journey's End Keep with Footsteps of Madness?
Nope.
The "will not be negated" portion is not an effect itself, but rather modifies the effect it succeeds.