[quote=@Etcetera]
<Snipped quote by DarkwolfX37>

And the weakness of those? It seems that finding a particular material that they dislike would be too simple.
[/quote]

Mm. Erelim are weak against spells that draw from certain types of spiritual power, in general. Dispelling techniques are also useful against them. Nephilim are extremely varied, but usually have a weak spot of some sort. A "heart" to aim for.