- "The proper owner of the aspen wand is often an accomplished duellist, or destined to be so, for the aspen wand is one of those particularly suited to martial magic. An infamous and secretive eighteenth-century duelling club, which called itself The Silver Spears, was reputed to admit only those who owned aspen wands."
- —Garrick Ollivander's notes on aspen wand wood[src]
According to Garrick Ollivander's studies on wandlore, wands made of aspen are more suited for martial magic and, thus, their owners are (or are likely to become, in the future) accomplished duellists. Wands of ebony are also highly suited to all manner of combative magic, and ebony wand owners have been found among both the ranks of the Order of the Phoenix and the Death Eaters.
- Pottermore (Mentioned only)