Soul weapon question!

So I have a zakum soul on my weapon. It gives me +20 atk when it is fully charged and has 1000 souls or w.e.

Anyways I am wondering if I have to do the activation to get that affect? It gives me a combo of down,down,up,up, atk. Not sure what it does. Is the +20 atk passive and permanent? It doesnt seem like it is getting +20 atk at all because I compared it to another weapon with similar atk (with the 20 atk boost) and my range was MUCH lower with the soul weapon.

The weapons description says hot totem drop will be available when you recharge your soul. What does that mean and what does that do?

I am sorry for all the questions I have never had a soul weapon before.

Edit* oh yea if I unequip the weapon and re-equip it do the souls go away?

I appreciate any answers! I looked at guides and they weren't specific with anything. Just told me what souls give what buffs.

December 28, 2015