Skill Stealing with Trial Key?

I have factions and Nightfall. I saw that NF came with a key that unlocks all chapters for like 10 hrs or something like that. And for a while now i ve been wanting certain Ranger and Ele builds but they require Proph only skills.

I was wondering could i use this key to open up proph get a Ferry over to it and get the skills i need then be happy? or do the skills run out when the time runs out? or can i just not Ferry over there.

You cannot use the skills from another chapter once the trial key ends. They will be unlocked for you again only when you buy the real game.