Well, I started NG+ on pure black and indeed it's very hard, since even with the Cling ring you'll only have 60% health and won't have the attack bonus when being in Soul Form.
Unless you're talking about World Tendencies, and those don't matter when you go to NG+, since they reset in each new game ;) Character Tendencies do stay put though.
What did you use the Hard Demon's Souls for? Ignite?
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