Under the bladebond magus it says that the blackblade is unbreakable (can not suffer tg he broken condition) as long as it has a pool point remaining. I say it is unable to suffer hp damage and can't be sundered until I use up its points but my friends say it can be reduced to 0 hp and destroyed at any time. Who is right? (i know w are probably both wrong lol, just looking for clarification).