https://warframe.fandom.com/wiki/Void_Armageddon#Rewards
On this page we can find void armageddon drop table(https://www.warframe.com/pt-br/droptables official drop tables says the same thing). There, it says hespar blade has 10% drop chance. Although, the price for a blade goes for +120p, what doesn't make sense for an item that, apparently, is easy to get.
I've got more than 5 galeforce down's already, but 0 hespar blade
I've also asked someone that had got the blade, he said he did more than 50 runs for one blade.
My question is, why is the (10% drop chance) mod dozens of times easier to get than the (10% drop chance) hespar blade, math isn't mathing