Sapper If ever a sound was associated with a particular class , it ' s the sapper . Quite simply , sappers love to blow things up . However , unlike many goblin tinkers , they don ' t necessarily like the idea of killing themselves in the process . No , to a sapper , the fiery blast of a good explosion is a form of art unto itself . Some spend a great deal of their lives trying to find new and interesting ways to generate beautiful , classy explosions . Sappers are experts in all sorts of explosive devices , from small firecrackers to powerful seaforium charges capable of blowing holes in thick castle walls . Even when they don ' t have a prepared explosive available , a good sapper can put one together out of whatever natural materials he can find lying around . Goblins are likely candidates for this class , since goblins like making things go boom ! Gnomes and dwarves also make able sappers , with humans following close behind . The Horde made heavy use of goblin sappers in the Second War ; indeed , goblin sappers were a key aspect of the Horde ' s strategy . Thus , the Horde knows how effective this class can be . In an adventuring party , a sapper often takes the role of a rogue or ranged combat support . He disdains typical rogue skills such as opening locks and disarming traps - he simply destroys such obstacles . When a battle erupts , he stays behind the lines , lobbing bombs into groups of enemies or employing fire - based technological devices to pick off more determined foes . A sapper generally takes great care to avoid harming himself ; but still , he spends so much time around explosives that accidents are bound to happen . As a result , his body gradually becomes covered with a layer of tough scarring that protects against fire . The sapper has learned new tricks to increase the yield of his explosives . Any grenade , bomb or other technological device he creates that deals explosive fire damage deals an additional damage per die . The sapper is an expert in both the crafting and use of explosive devices . Any sort of bomb or grenade — basically anything that blows up — is his specialty . A sapper can attempt to build small explosive devices out of whatever materials are available . Even in the midst of an untamed wilderness , he can usually locate certain plants or minerals that , when mixed together , become something flammable . The sapper is an expert on the delivery of explosive devices from a distance , whether employing any thrown or launched explosive device ( such as a mortar ) . The highly skilled sapper has transformed explosives into works of art . He can deploy a perfect blast — a thing of beauty ( at least to himself and his allies ) . He can use this ability with any explosive device — as small as a grenade all the way up to massive wall - cracking charges — but he must prepare , set and activate the device himself . Doing so takes twice as long as normal for the device in question , but if it is successfully set off , the explosive deals the maximum possible . Goblin Sapper . A great number of sappers - primarily goblin sappers - perished during the last war , mostly as a result of their overzealous use of too many explosives at once . Those who survived have become much more focused in their art , preferring precision to risks . Generally , the older a sapper is , the more careful and cautious he is - and the more respect his associates give him . Alliance Sapper . Sappers are engines of destruction ; when the Alliance needs a structure removed from the battlefield , a dwarven demolition team is sent to blow it away . Sappers invite bloody death ( and hearing loss ) every time they go into action , but the sight of a Horde gatehouse collapsing into a pile of rubble is well worth such risks . Dwarven Sappers . Cheerfully striding onto the battlefield is a team of odd dwarves , scarred and blackened faces , a mace in one hand , a pistol in the other , hauling kegs of powder strapped to their backs . They seem to ignore the rest of the field . The sapper ’ s tactics focus on delivering large amounts of gunpowder to a target and using his skills to destroy it . They are aware of the surrounding battle only as it concerns their ability to reach their target and have enough time to set a charge and escape . This team likely later evolved into the Dwarven Mortar Team .