The abode of eternal ice is located near the the islands of eternal frost before you go into the blue abyss vortex thingy.The location you need to click is called northern traveler.
To enter the instance you need to read ancient cryptos.(tablet things like this one
http://warofdragons.com/artifact_info.php?artikul_id=21814 )
Which you acquire by colecting a set number of fragments.:
180 for grey
120 for green
60 for blue
30 for purple
12 for red
Each cave you unlock with one of the cryptos.
You need to have 'read' the previous cryptos. Like to you cant go and 'read' the red cryptos without having read the purple one and so on and so forth.
The fragments you get from bags which are occasionally sold for 30 sillver or 0.25 diamonds.
Beware that you get only 1 fragment per bag and its random what quality it will have.
The intance is available to players from lelvel 5 and is open for 1 day every 6 days.
The rewards for this Instance is mainly Quicksilver . How much quicksilver you gain depends on your character's lvl aswell as the color of your juggernaut's medal .I for example lvl 12 with green badge get around 550 quicksilver
In each gave you will also find ice flowers you can gather without any tool. The ice flowers you trade to the alchemist in the guild of artisans for red elixirs which are the same strength as the christmas elixirs but with a 30 day lifespan and without the whole 'dissapearing on the first day of spring'.
Also there is a low chance to get a piece of a pet medalion from any monster in the instance.