Guild Wars 2

where is this chain at and would a group of 5people be enough to do it for achievement or do yua need a big group?

if big big group is needed whats best way to get one

If I recall correctly, this achievement is tied to the Taidha Covington event chain, in Bloodtide Coast. Check here for the meta-event.

From what I can remember, 5 might be enough but it won’t be easy. One of the champions of the event is tough. Now that the API is out, you should be able to check on gw2stuff.com to see when the event will be up on your server.

5 is definitely enough. Did it with 2 for my achievement. :P
Taidha is tough but she also doesn’t reset.