Hi,

If an insane Rampaging Dark Young enters a discard pile from play, can I trigger its ability? What about with insane •Professor Nathaniel Peaslee ?

I guess I found my answer. From the: http://www.fantasyflightgames.com/ffg_content/coc/support/coc-faq-ver-1-2.pdf

(v1.0) Card States
If a card has an ability that triggers in
response to said card entering the discard
pile, that effect does not resolve or
trigger if that card had blank text due to
a card effect, was attached to a domain
as a resource, was discarded from hand,
or was insane before it entered the
discard pile.

P.S.: This iframe java editor that can't be turned off from profile settings, truly sucks ass.