Are racial spells concentration? For example: Drow Darkness, Duergar Enlarge, and stuff like that? I've been curious about this for some time but haven't found information about it.
On top of this, can racial spells (such as the tiefling Hellish Rebuke) be counterspelled?
They require concentration normally, there is no change there.
A spell can be counterspelled as usual, as long as there are components (V, S, or M). I am fairly sure most races don't ignore components, so they can be counterspelled as normal.
Are racial spells concentration? For example: Drow Darkness, Duergar Enlarge, and stuff like that? I've been curious about this for some time but haven't found information about it.
On top of this, can racial spells (such as the tiefling Hellish Rebuke) be counterspelled?
They require concentration normally, there is no change there.
A spell can be counterspelled as usual, as long as there are components (V, S, or M). I am fairly sure most races don't ignore components, so they can be counterspelled as normal.
They follow all the normal rules for casting a spell unless stated otherwise.