Take the chipper you made to the Ring War Battlefield.
There are six ice egg-like objects you can interact with. Click one and you'll have to kill a level 90^^^ giant, after the giant is dead click the ice again to receive your update. Do this 6 times, there are 6 click-able ice eggs on the Ring War Battlefield, you must do each one.
Note: The giants hit really hard, are CC immune, and have stifling detrimentals. The giants have an AE knockback effect with moderate damage. Be prepared with a sturdy tank and good heals. Knockdown and other interrupt effects do work and make the fights smoother as you can entirely avoid the giant's AE knockback.
Note: With careful click timing, the entire group can get the update when clicking the ice tomb after killing. Click immediately after killing the Coldain, otherwise it resets.