Dwarfs
Strong
Good blacksmiths and metal manipulators.
Good miners.
They are robust but not all, some dwarves are more fascinated by building things and forging, so they are weaker but, there are others who are great explorers who face caves full of monsters in search of gems or large ores, the exploring dwarves are stronger and of course since it is part of their routine to have to deal with monsters while exploring the caves.
Weakness
They are not very agile, and this lack of speed is what encourages them to make the best machines, weapons and armor, so that they are able to take on their enemies, and deal with the predators they encounter in the caves.
Since dwarves spend most of their lives in caves and at the base of valleys and mountains, they usually have little knowledge of the surface but, a lot of knowledge about the underground.
Suggestion: there may be a legendary dwarf who in the past killed a dragon or something, and this dwarf would have used a dragonslaying sword that was specially forged to kill dragons or a two-handed axe that was forged to kill dragons.
Suggestion: Mecha or power armor
Suggestion: Dwarven magic might be something about runes that they use to draw ethereal magic.
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