No, it means the damage you deal to vendrick is divided by that amount. For example, if your weapon normally did 288 damage, it gets divided by 32 to do only 9 damage.
Well, you may have to farm them again each NG+ in order to quickly dispatch Vendrick. As long as you keep 5 of them in your inventory, you may pop any extra one for they'll not give you any benefit whatsoever.
Used one in the room with Vendrick, because I vaguely remembered they had something to do with him Then I open this page and you don't need to use them, just hold F**k my memory
"Lower Vendrick's defense bonus when souls are in your inventory." OH, COME ON !! IT TOOK ME HALF AN HOUR TO KILL THAT BASTARD when I keep reading about things on the wiki, I feel even more stupid about everything I've read.
I summoned 2 npc phantoms to help fight the 2 giants for fun, nit only did they not come down with me, I got to fight 4 giants at once, I lost but I almost killed them
I had 4 souls 2 times i killed him, 1 faith str with barb gs around 430 damage buffed and 1 pure str build over 500 dmg with great club and magic resin