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I decided to write about each of the Dwarf units.
This is all just my opinion.
Mountain Guard - the most protected Tier 1 unit; the damage, of course, is only 1.
Warrior - a worthy upgrade. It has 1.5 times the health of the Mountain Guard and deals 1.5 times more damage. It can even injure someone.
In addition, it has the "Shield Wall" ability.
If the enemy is moving while attacking, their attack will be weakened by 10% for each cell traveled (maximum 90%).
This unit can significantly disrupt archers.
Of course, with the help of the Speed Rune.
Spear Thrower - the damage is so-so, and the health isn't great either.
However, the shot has a chance to reduce the enemy's speed and initiative by 2 turns.
It has two projectiles... wow. No one needs a cart full of ammunition as much as the Spear Thrower does.
Bear Rider - this is our cavalry. We'll eat, and we'll ride on a bear in the early morning. It has excellent armor.
It can easily tear apart a Minotaur or a Hellhound. Of course, the attack isn't high, but it's stable.
Bear Lord - it has better armor than a Hydra, Hell Steed, and Unicorn!
It is immune to defense reduction.
And it has an interesting ability called "Paw Strike" - a chance to knock back the enemy a few cells. However, it doesn't always work well against archers. Fortunately, they are often standing at the edge of the battlefield.
Bonecrusher - it has immunity to mind control. It is the number one candidate for intercepting enemy forces. I really like its high initiative.
Berserker - it lives up to its name. It can activate a battle rage mode, which changes the Berserker's parameters (defense is added to attack, and the defense itself becomes zero), and it deals damage to the nearest target without retaliation. A squad of these guys can fight units much stronger than themselves.
But you need to be careful, because if there is no nearby enemy target, it will attack its own.
Rune Priest - a magnificent ranged attacker! You just need to protect him, because he's a bit fragile, but otherwise, he's great. His spells aren't very good - mostly evasion, but that's useful too. He also takes only half damage from magic attacks, and his own attack sometimes inflicts a curse on enemies, which doubles the damage from fire on the target for two turns.
Arcane Priest - a nice upgrade. It adds the "Wall of Fire" spell. It only lasts for one turn, but if you use this spell on enemy archers, it will ruin their entire tactical plan.
In my humble opinion, this is the best unit at its level. Only the Unicorn can compete with it.
Than - the fastest fighter in the Dwarf army. It can move up to eight cells.
The attack for its level is frankly disappointing. It is saved by the "Storm Strike" ability, which hits all nearby enemies.
But you can protect yourself from these consequences.
Jarl - the difference needs to be studied under a magnifying glass. One more damage? A huge success for a Tier 6 unit. It also has a little more health. And that's it? Oh yes, once in battle, the Jarl can launch his "Chain Lightning" at a distance. In my opinion, this is the weakest upgrade. It can only be improved if you have a lot of resources.
But at least it looks good.
Fire Dragon - a solid dragon, weaker than the Twilight Dragon, but stronger than the Emerald Dragon. It breathes fire and is immune to fire.
It returns 20% of the damage it receives to the attacker.
It is an elemental, which gives it immunity to poison, mind control, and blindness. But, unfortunately, it cannot be resurrected. Considering its value, being an elemental is more of a disadvantage for it.
Lava Dragon - the most durable creature in the game. It has all the properties of its fire-breathing counterpart, plus the Lava Shield returns 40% of the damage.
It can be killed by Earth Shock, but if the enemy is not very strong in magic, then the Lava Dragon is the strongest creature we have seen in Heroes.