Casting Formation now allows Mana discount for Prince's Immediate Spells, but limits a Prince to 1 Immediate Spell per turn. Princes and Chaos Mages make change into Casting Formation duing Cast & Build phase - not the Movement phase.
Opportunity Fire added for Missile Units, Replaces Hit-And-Run for LC in Expert Rules
Temple Exchange now allows you to trade excess Gold or Mana at 2 for 1.
Chaos Mage spells and Advanced Variant Schools of Magic adjusted for balance.
Several minor adjustments made to rules for clarification, including new examples.