http://wiki.guildwars.com/wiki/Idol_%28knife%29
http://wiki.guildwars.com/wiki/Blood_Knife
both pages dont have any drop info, but do they drop? (wiki can be outdated sometimes)
i know collectors have em, but i rather have an inscribable one (12 energy)
i never pickup any focus if it isnt maxed and req9 or req10 and mostly dont get em if they arent gold
