Casting certain spells

[Windreaper]

I've been pestering the devs for this feature all the way back from Dom1. The devs however feel that it contributes to the unpredictability of the battles and thus don't want to give us _too_ much control (magic being powerful enough as it is). You can still get pretty good results by scripting the first 5 spells. Odds are that by the time 5 rounds have passed the spell AI won't be casting any silly spells since the enemy is rather close by then.