Are there any restrictions on the type of armor a hero may wear? I still have a D&D magic-user can't wear armor mentality, but there do not appear to be any armor restrictions in the Descent: Journeys in the Dark rulebook or FAQs.

Heavier armors in Descent put a maximum on your speed and prevent you from equipping Runes . Since most (though not all) magic weapons are Runes , magically-inclined heroes in Descent usually (though not always) stick to light armor. Also, heroes with high speed have a disincentive to wear armor that would limit it, while heroes that already have low speed don't need to worry.

Good explanation. Thank you!