combat casting
Some magic is more suitable to be cast during combat than other. While combat spells can be cast easily during the heat of battle, non-combat spells require increased concentration to succeed. This extra concentration means that the caster cannot make any other attacks during that time. Additionally, if the caster is under attack while casting, his chances to lose concentration increase significantly. Additionally, the meta-magic system allows some spell casters to greatly manipulate their spells. Read help meta-magic for more details.