RvRFollow

hi i was wondering how that during an Rvr session with my mates level 50 i saw that people would set traps and also that a spirit master was able to reserect me how do they manage this as i asked sumone about it and they said u have to save up all ur money and buy it of an NCP or summing can sumone tell me how i go about getting these abilities when the time comes for me to start goin to theses RvR sessions thanx in advance

thanx v much is there anything specific that a skald can do just like the spirit master????? and wot level can i take the trials