Some halfelves in Faerûn have a racial trait in place of the Skill Versatility trait. If your DM allows it, your halfelf character can forgo Skill Versatility and instead take the elf trait Keen Senses or a trait based on your elf parentage.

Drow Magic
A halfelf of drow descent can forgo Skill Versatility and instead choose the drow’s Drow Magic:

You know the dancing lights cantrip. When you reach 3rd level, you can cast the faerie fire spell once with this trait and regain the ability to do so when you finish a long rest. When you reach 5th level, you can cast the darkness spell once with this trait and regain the ability to do so when you finish a long rest. Charisma is your spellcasting ability for these spells.

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