Chilled to the Bone Rift ?

Answer 1

http://rift.zam.com/en/quest/1459982959/Chilled-to-the-Bone

thats the little info the zam site has on that quest, which for some things is one of the better sites though currently does not have a walkthrough for many of the quests,

from the objectives this is an invasion quest. the world events

invaders are marked as small crossed swords on the map and can be done solo for many character setups.

the wardstones you will have seen before, these are the crystal like things in every town you come across, during invasions at least one of these must survive.

the last part is the big boss, which shows on the map as a skull and will require quite a few people to kill, 20 plus

most if not all of these quests do not require you to hand them in, though there are some quests that can be done as part of the invasions and these will need to be handed in.

the quest will change slightly for different invasions, different bosses, bot still require quite a few people to complete them, mainly due to the wardstones part