Blood

　　The characteristic was single threat,and group threat can only got from death and decay and blood boil.With 6% stamina improved and Magic deflexion for higher survival ability

　　Orthodox blood tank(49/5/8,the more 9 points can be distribute yourself.)

　　The necessary was as much of that .The blood worm was not suggested.and thechoose of doom and The Might of Mograine are depend on person.There are not so many talents to choose from.The foul disease was better than nothing,Ravenous Dead was only useful for its 3%strength,Improved Icy Touch was useful only when cannot share with others.

　　Blood with threat improved(50/13/8)

　　
　Frost

　　The former orthodox Tank,with perfect multi threat,and single threat pressed on toward the pals.3% melee hit rating decrease and magic resistance made it survive more easily.

　　The constant mitigation of Unbreakable Armor are so weak at the face of great single damage of Boss in ulduar.Advantage lefted only was high opening threat of fixed Howling Blast.Generally,it can takes all kinds of smaller dungeons,but in ulduar,it can only be a Tank for mobs.
　　The important talents are staied deep in frost,so it can hardly got a second talent.

　　The talent(15/51/5)

　　The frost was brief but not simple,and the Acclimation was not so good as it looks.The unholy and blood are more flexible,the main difference are on the  Scent of Blood.You may put on the morbid of unholy if facing a lack of group threat.

　　Unholy

　　Deep unholy(10/10/51)

　　The choose of deep unholy was troublesome,The black ice ,Anti-Magic Zone,Desecration and Necrosis can be adjusted by Dirge or Night of the Dead,personally,I'm not favors to the anti-Magic Zone,it's nerfed too much for the balance of PVP.
　　Unholy tank with Veteran (23/5/43)

　　The veteran was at the fifth line so 20pionts at least was required.
　　The talent of DK tank was quite flexible and copy was not needed,depend on your personal requirement and habit was just all right.

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