DK Blood Talent

Death Knight has three different talent schools such as Blood, Frost and Unholy. Each talent school has a very specific use. As a Death Knight, each talent has a little bit of focus but does not lock you down to a specific function. Here we will mainly talk about the Blood talent.
Blood viewed as the PvE and leveling talent tree due to its focus on self and group healing and buffs. It is a standard talent builds for both leveling and endgame PvE content. It is capable of keeping going when it does not put out the damage numbers. Blood has many talents that boost a Death Knight's self healing ability, grants healing to others, and boosts damage.When it comes to an endgame PvE build, it aimed to get the most damage out against a single target as possible. While most of the points are spent in the Blood School, it does dip into Frost to gain Annihilation, as well as the Unholy school for some additional damage.
Blood Aura can grant you a permanent passive ability that affects all party or raid members within 45 yards and it also causes them to be healed by 2% of the damage they deal. While the percentage may be small, in a raid every little bit of passive healing helps. These abilities grant a important amount of health back to all players, which combined with a Retribution Paladin and a Shadow Priest. The strain on healers that stacking these types of abilities alleviates should not be discounted.
Hysteria allows you to induce either yourself or a friendly unit into a killing frenzy for 30 sec. While affected, it will increase the target's physical damage by 20%, but will cause them to suffer damage equal to 1% of their maximum health every second. This is a great DPS buff for yourself or any other player in your group. While soloing with Blood Presence active you will heal for more damage than it causes and it will allow you to down an opponent faster. In a raid situation if you are not the top DPS you can always buff someone else with this ability to increase their DPS significantly for a short period of time.
Annihilation is clearly a Frost talent. However, it's one of the key abilities you will use when looking to maximize your DPS against a single target. It increases the critical strike chance of your melee special abilities by 3%. In addition, there is a 100% chance that Obliterate will do its damage without consuming diseases. The key point is being able to use Obliterate over and over again without having to waste time applying diseases. This saves you two global cooldowns in your rotation to do additional damage.
Two-Handed Weapon Specialization increases the damage you deal with two-handed melee weapons by up to 4%. Again extra damage is equal to extra threat. If you want to be viable when your DPS party members start to gear up, you need to cause as much damage as possible.
Hysteria induces a unit into a killing frenzy for 30 seconds. Enraged increases their physical damage by 20%, but causes them to suffer damage equal to 1% of their maximum health every second. It can be used on yourself or anyone else. It provides a huge DPS increase to anyone in your group. The damage causes back to you is very easily healed through, even just by your blood aura.
Dancing Rune Weapon unleashes all available runic power to summon a second rune weapon that fights on its own for 10 sec plus 1 second per 5 additional runic power, doing the same attacks as the Death Knight. This is the Blood talent school's runic power dump. It uses up all of your current runic power to cause a significant amount of single target damage.