by Artaterxes
Two things.1) Battles over distances using magic. Accumulate units to build a glyph on a hex, and they can target distant hexes.
2) Storybook. Include a lieutenant for each race. Each scenario would have specific races fighting each other with a specific objective. Both dragon runes and specific quest items that only heroes can acquire would be required to complete the objective. If only one copy of the quest item exists, the heroes would have to duel each other for it.