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hi i was thinking about collecting high elves, but first i would like to know do they have units to kill new daemons, and which ones are they.
No, they have the lore of light which does extra damage to undead and daemons.
Personly i have found the high elves to be one of the best armys to counter the new deamons. Alot of there units are t3 like us so striking first is great at killiing them, so is missle fire, bolt throwers are sweet at thining there ranks. i have yet to lose to a unit of bloodletters.