[Rendar]

Interference shuts this down, entirely and will net you an instantaneous victory against a Dullahan since there are 0 ways to cure a 10+ round interference. It'd also stop the regen as well, keeping them in a perpetually "KO'd" state so they can't heal whatsoever. HP, or FP. Which means that Dullahans are worse than incapacitated, simply because you can't revive them ontop of that.

Less their 1 round stun also gives them stun immunity.