On black and white 2 you first have to be no the norse land
Secondly you need to get the undead legoin task done okay.

Its simple get a big level 1 army (soliders) not archers and merge them with the undaed legion and you will have a level 10 big army in seconds

And save it
And when you turn the game back on you will have not undead and soliders
U will have all UNDEAD.