hi, im playing in icecrown, lvl 20 blood elf in horde.
1- the server have discord?
2- in the quest "Powering our Defenses" not appear mobs to kill, i seek in youtube videos how to do "Powering our Defenses" and after Infused Crystal... not appear mobs!
Quests may be bugged for a while, if it's not game-breaking for you I'd suggest skipping it and doing something else. Check the bugtracker. If it's reported there upvote it, if it isn't post a report and that's about it.