Destruction Destruction is the process of destroying structures , breaking them down into the parts that they ' re constructed of . Conversely , construction is the process of constructing structures . Constructs . Constructs are constructed creations that can be - or are - destroyed over time or outright obliterated . Arcane Constructs . Arcane constructs are creatures spawned of pure mana and intellect . In the right hands , a construct allows its user to quickly assimilate vast riches of arcane knowledge . Fel Constructs . Fel constructs such as infernals are creations constructed with matter and fel energy . Death , Decay , and Entropy . Death , in the form of necromantic magic , can be defined as the destruction of the mortal body and it pushes everything towards a state of entropic decay and eventual oblivion . Entropy , as it can be defined , is the representation of the unavailability of a system ' s thermal energy for conversion into work , often interpreted as the degree of disorder . Order , in reality , is most commonly perceived as arcane magic , which necromancy is a school of . However , this does not mean order is always perceived as arcane magic . This type of energy is innately volatile , and wielding it requires intense precision and concentration . Now , conversely , disorder is manifested as highly destructive fel magic , a brutal and extremely addictive energy fueled by drawing life from living beings . Denizens of the Cosmos . Demons . Demons are evil immortals who feed upon life and magic . They had been formed as a result of the Light and Void energies that had bled together at the borders of the Twisting Nether . Held in the thrall of unbridled hate and malice , they hungered for nothing less than the destruction of all life in the universe . Professions of the Cosmos . Warlocks . Warlocks are magical practitioners who seek to understand darker , fel - based magics , including destructive spells . Warlocks who command the power of destruction favor incantations of pure chaos and aggression in battle . In this regard , they ’ d find a stronger kinship with fire mages than warlocks of other disciplines — if not for their propensity to make use of magic deemed detestable by all mage orders . The destruction warlock is well - versed in discharging a dizzying array of shadow , fel , fire , and chaos magics upon opponents that rattle souls and conflagrate bodies . They require little motivation for the havoc they wreak , happy to revel in the destruction they cause — thrilled at any opportunity to watch the world erupt in discord around them . In - game information . This tree ' s emphasis is to improve the Warlock ' s ability to do direct damage as opposed to damage over time and greatly enhances their ability to do burst damage . It mainly affects Fire spells , but is not restricted to them . This tree provides the warlock with four spells that are exclusive to it : Chaos Bolt , Conflagrate , Shadowburn and Shadowfury . The last 3 are instant cast direct damage spells ; Chaos Bolt on the other hand has a cast time , but is the single hardest hitting spell in any Warlock ' s arsenal . With the inclusion of Death Coil and Shadowflame , Destruction warlocks end up with five instant cast spells . This makes them quite versatile when dealing with foes . The warlock who chooses the path of Destruction becomes an instrument of heavy artillery . Capable of dealing massive amounts of damage over a very short period of time , but sacrificing some of their survivability in the process ; their role in a battle is to either stand back and help finish off enemies one at a time before they can be healed , or charge into a melee and completely disrupt a battle , usually at the expense of their own life . Destruction is often the spec of choice for Warlocks that would rather do heavy direct damage themselves . It is often perceived as the best spec for PvP as it gives you the tools to quickly finish off a foe . However , its usefulness in arena play , especially in 2v2 , is debated . Unlike the Affliction and Demonology trees , Destruction offers very little in terms of survivability or damage mitigation — two valuable assets in arena . The tree is clearly focused on damage . The introduction of resilience took quite a bit of punch out of Destruction ' s PvP appeal . Moreover , many of its spells have longer cast times than the DoTs of Affliction which gives opponents the opportunity to interrupt your spellcasting . For raiding , Destruction is valuable bringing very strong DPS to a fight , along with an Imps Blood Pact and Replenishment through Soul Leech . DD locks are often at the top of DPS ranks in raids . EDIT : The following is not so true with the above : Destruction spells are mana intensive so it is vital to manage mana efficiently .