School of Earth Magic
School of Earth Magic is one of the four schools of magic. Others are Air, Fire and and Water. School of Earth Magic is related to the secondary skill Earth Magic, which allows heroes' to cast earth school spells more effectively and at reduced cost. The cost reduction is the same regardless of whether a hero holds the skill at basic, advanced, or expert level.
Discussion
School of Earth Magic is perhaps the strongest of all the schools, because it has a wide variety of all kinds of spells. The most powerful of them all is Town Portal, which with expert Earth Magic enables hero to teleport to any allied town with a mere cost of 20 spell points and 300 movement points. This alone would be excellent feature, but what makes it truly great spell is that a hero can cast Town Portal unlimited times, provided that he has spell points or movement points left. In comparison, Dimension Door can only be cast four times a day at expert level.
Other powerful spells in the School of Earth Magic are Resurrection and its undead counterpart Animate Dead, Force Field, Earthquake and Slow. Resurrection (or Animate Dead) combined with Blind may save an entire army with enough spell points. Force Field is not so useful against human players, but in wandering creature stacks it becomes extremely tactical spell. Earthquake can be handy in siege battles. Expert level Stone Skin cast with expert level Shield is a combination that significantly reduces the damage recieved from enemy army. Implosion is the most expensive spell in the game but wreaks havoc on a single enemy troop. Last but not least is Slow - a counterpart of Haste - is also so powerful spell cast at expert level that it raises the question why is it a level 1 spell.