In the seventh book, when Harry is escaping from Malfoy Mansion he grabs three wands from Draco Malfoy and uses a spell against the snatcher Scabior. The effects are described as more powerful than a single wand spell.

What is the downside to this "strategy", for it to not be commonly used among wizards as one can seemingly create more powerful spells?

marked as duplicate by Rand al'Thor Jan 21 at 11:39

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  • @Rand al'Thor The duplicate chain on this is something fierce, and going to back to the questions that are not closed, they don't seem to answer this. I think something along on the chain needs to be reopened but I'm not sure what... – Skooba Jan 21 at 13:12
  • @Skooba Perhaps this one could be reopened? The two later ones are pretty clear dupes of it, but the two earlier ones, even taken together, don't seem to resolve it properly. – Rand al'Thor Jan 21 at 13:24
  • @Randal'Thor Yes, that one should not be a duplicate of the two it is closed based on, but the two questions closed based on it are indeed duplicates. – Alex Jan 21 at 17:16