Dark Reign - Snowfoot Attack
For this task you need to venture back to The Ascent, up to the second level and start working your way towards the top. You'll find a bunch of goblins on your way but they can't be called 'A ascent <whatever>' they have to be called 'A Snowfoot <whatever>' to give you credit for this task. A picture of the type of goblin you're looking for can be found above.
These goblins can be found all along the upper half of the northern path and about 6 at the very tippy top of The Ascent.
Note: If you're playing on Phinigel as you can tell this guide is written for players wayyy beyond your current expansion. If you'd like please leave comments below for players YOUR level and I will add them to the guide - thanks in advance for anyone who actually does!!