Talk:Ainz Ooal Gown/@comment-26514268-20160124130009/@comment-75.131.212.234-20160124222406

I agree that a good chunk of Ainz reason for fighting himself with out any of his forces would be part of what we can consider as his pride, but also of how he really doesn't want to see harm come to the NPCs of Nazarick (especially by their own hands when someone else is the one responsible for the stated of one of the NPCs).

Don't forget that the goal for the first part of the fight between Shalltear and Ainz was to get Shalltear to use up her skills and MP ( plus very likely the resurection item Peroronchino had given her), so he probably wouldn't set up some incredably complex atk that would have done massive damage/kill her (even more when we consider that he could have just activated "The Goal of All Life is Death"  + any instant kill atk and waited for the instant kill to occur). We should also take into consideration that at the time Ainz was beeing carefull/paranoid of the unknown enemy waiting in lay for the chance to attack him, so he would probably be carefull as hell not to use much of the MP high tier spells would consume, over the skill-like cost of Over-rank magic. Not to mention appearing as weak as possible to possibly decieve the enemy into the expected power that nazarick has at it's disposal

Regarding using magic to set-up a great amount of defenses/traps vs Shalltear it could be a matter of duration of effect of a spell vs time needed to recharge the mana consumed by the casting of the spell. Wheter or not the spells would last long enough for him to regain his mana plus fight shalltear. He would probably not use cash items for recharging mana due for the same reason as above with him been wary of the unknown enemy.