Overlord II

once you reach the arena part of the game you will face about 5 or six rounds of enemies. you will fight humans that you can easily subdue or kill and then you hae unicorns which once you light on fire are done then i think it is the gargantuan round. just strafe his attacks and then throw your greens on his back and hit him with a 3 hit combo then call your minions back and repeat. if you run out of minions there are ases all around the arena with "pixie dust" around them and when you smash the ase you get the color minion that coorellates to the color of the "pixie dust". once you finally get to the yeti round make him throw a barrel at on of the doors guarded by soldiers at the northeast and northwest corners of the map and then dodge it and you will be able to head upstairs for some easy destruction or domination points and then on the left or right side you should see some pillars. send your minions to the pillars and the emporeors seat comes tumbling down with the blue spawner. after that basically deal with the yeti, subdue or kill, and then get the spawner and get out of there.

This achievement is unmissable.

SPOILER

After you defeat Yeti in the Arena you will have the option to enslave him / kill him, behind him will have the Relic of the Blue Minions, just send your minions to capture it, as soon as it enters the portal to Netherworld Town you unlock the achievement.