Mostly because I find my ability to put my thoughts into words and expressing myself is middling at the best of times, and down right poor when I am tired or stressed about other things.
Also, partly because people praised their description on the Steam Summer Sale. Who am I to get in the way of what the people want?
But, I will try my best to describe some of the things I enjoyed.
The game starts out with 4 (6) factions, each with 4 heroes, 8 units, and 8 spells. The factions share a lot in common, but each has their own traits.
Undead poison troops, and have units that can summon skeletons.
Dwarfs get extra boosts from Equipment and can summon buildings instead of cast spells.
Wild has the ability to boost their troops with Ambush (if they didn’t attack) and ancestor power (if a hero killed a unit nearby).
Elves also have poison, and heavy into archers.
Mechanical is tough, and can self repair.
And so on.
But the units and heroes only scratches the surfaces. You can boost Units by unlocking upgrades for a particular unit. Usually 6 levels of unlocks, with 3 options each. The unlocks apply to all units of that type, so specialization is beneficial.
The unlocks are usually smallerish, but some are game defining.
Vampires have a ranged attack… the first unlock can make it more powerful… or it can turn them into a Melee unit.
Skeleton warriors can be made even cheaper, or you can make the stronger.
By the way, instead of upgrades, you can equip items on the units but if you do, the cost of the units go up. Find a magic Bow that increases range? Sure, give it to your heroes. Or, give it to your Elven Archers. Now, you can upgrade each elven archer to have that bow.
Finally, Techs. Techs are universal, and come in three flavors in 3 ranks.
Magic - spells cheaper and/more powerful
Empire - upgrades to your castles - Undead can unlock free Barracks, which increase their population cap. And then their barracks can generate gold with another tech.
And units. Like unit upgrades, but universal.
In the midst of all this, you can pick up merc camps, which have their one 4 heroes and dozen units, sea castles, with 2 heroes and a dozen units, elemental sites that can summon and merge elementals, and dragon lairs.
Anyway, I think that covers what you can do in the game.
As I said, I mostly play the challenge game, which does away with all the unit building in favor of just getting heroes and leveling them up.
But I enjoyed the fact that the factions play differently. The heroes has different roles in the faction. And even an individual faction can be tailored while playing the game to your needs.