Extending Spell Durations

All of the buff spells have a duration on them. This duration is determined by the level of the caster at the time the spell is cast.

If the same caster casts the same spell again at the same level, then the duration of the spell will be extended.

What this means is that when you are in town, you should go through and cast all of your buff spells for a duration as long as you will need in order to get to the next town or store.

What happens if the caster level changes?

This causes a couple of things to happen. If you recast a spell on a character that was originally buffed at a lower level, then the spell duration will change - usually it will decrease. The duration will not reset to a single casting, but will decrease in proportion to the increased bonus of the spell at the new level. So it will still have an increased duration (though not what it was) but will also have the increased benefits of the higher spell level.

This can be a bit inconvenient because the character earns experience for casting buff spells. So it is possible to level up mid-buff and then have to go back and re-buff someone to get to the desired duration.