Dual-core wands? (was Elder Wand ownership (was Dual-core wands?))

[Zara]

No: HPFGUIDX 181544

> CJ:
> But *I* want to talk about *my* point, which is that wand strength 
seems 
> to be cumulative: the triple spell that hit Greyback appears to have 
> been more powerful than Harry could have mustered with his own wand. 
If 
> three of any old wand is more powerful than a wizard's own wand, then 
> who cares if the wand chooses the wizard? Just grab any three wands 
and go.

zgirnius:
This is not addressed within the books specifically. However, the 
common sense type answer that suggests itself to me is loss of control. 
More wands make a bigger bang, but less control of the sort of bang and 
location of the bang that results. For combat spells this might be an 
OK tradeoff (though not if a single, skilled wizard's Protego from his 
own wand can send all that right back at you!), but for most magic, 
perhaps this would make life more difficult.