Today Blizzard official website made changes of the descrition of the natural tree from death knight. The new and old descrition of the death knight are as follows:
The new one is as follows:
Blood: talents in this trees focus on weapons, armor, and strikes.
Frost: talents in this tree focus on control, counters, and combos.
Unholy: talents in this trees focus on spells, summons, ans diseases.
The old one is as follows:
Blood: talents in this trees focus on damage-dealing abilities.Blood presence increases damage output by a percentage.
Frost : talents in this trees focus on tanking abilities. Frost Presence increases threat and lower damage taken by a percentage.
Unholy: talents in this trees have a varities of funtions includes summons, disease and PvP focused abilities. Unholy Precense increases attack speed and reduces the global cooldown on death knight abilities.
I hope the above-mentioned information will help you to get to know the death knight more and more better. In world of warcraft, only you know all professions in it and know how to operate, in this way, you can make enough wow gold and hope you have a wonderful wow life.