Testing with Demonslaying Blade, I got some Evasion Negation, but only sometime of the time with the "You dance inside <opponent's> reach, slashing into them for <x> melee damage" messae.
Vs. Lake Serpents (with Water Lurk):
You dance inside the serpent's reach, slashing into her for 13 melee damage, but the lake serpent is already underwater. The water absorbs all but 3 damage. [No evasion negation]
Angry Rat (Also Sewer Mutant) (w/Burrow in Garbage):
You dance inside the rat's reach, slashing into it for 11 melee damage, but the rat avoids the worst by burrowing into garbage. The garbage absorbs all of the damage. [No evasion negation]
The rat burrows into garbage.
Third Eye Ganger (also Dock Guard w/Dive for Cover):
You dance inside the thug's reach, slashing into him for 17 melee damage. The attack came from an unexpected angle, avoiding the thug's defense.
The thug dives for cover.
Ghoul (Leap/Ceiling Crawl):
You dance inside the ghoul's reach, slashing into it for 12 melee damage. The attack came from an unexpected angle, avoiding the ghoul's defense.
The ghoul leaps a shocking distance straight up.
You dance inside the demon's reach before slashing it for 31 melee damage. The attack came from an unexpected angle, avoiding the ghoul's defense.
The ghoul crawls along the ceiling above your head.
Probably as a general mechanic of negation evasion, there are some techniques that are susceptible to it and some that are not. This does make sense as an evasion-by-barrier (hiding under water/garbage), vs evasion-by-running-around (diver for cover, leap above).
I've written this before: there are techniques that evade damage from other techniques; and techniques that reduce effectiveness of techniques that evade damage, and techniques that prevent techniques from occurring, and items that prevent techniques that prevent techniques from working, and other opponent flags that prevent techniques from doing damage; not to mention techniques that only evade damage from particular directions, and techniques that entirely evade evasion — BUT now we have to add to the list techniques that evade the entire evasion evasion. Well done Kinak, well done.
EDIT: Dueling Shot DOES avoid Dive for Cover but does NOT avoid Water Lurk. That seems consistant.