"The bad news wouldn't be that this spell has a duration, disappearing completely after a few minutes or a few hours, would it?" Gaven followed Philancy's lead and guessed her next piece of bad news.
Most spells do have a duration, and the strength of the magic effects they produce varies - some are measured in seconds, others in rounds (six seconds per round), minutes, hours, days, or even years. Only a very few alterations are permanent. Such magic usually adheres more closely to the Laws of Physics, having minimal distortion on reality - for example, Stone Shaping Spell, Stone to Mud, and so on.
