The Assassins Blade quest has a confused start where you get the blade already. Then you are led through 3 combat situations, and finally you should "have the blade". There is no place to "have the blade" and the quest can't finish. Furthermore, it blocks for the starting of new quests. This was discovered using quest maps.
However, I could start (and finish) the Victory quest. As mentioned in a previous post this quest is too easy. I finished it with 5 heroes this time, at level 20, 12, 10, 9, and 8. Also the final battle with the dragonlord is somehow weird. At least I consider it a bug that you can just stand back and shoot him with arrows and he never advances. Easy kill - for the hero with a bow - the rest got it after a long battle.
/Bark