The Red Lightning Hose is one of Diablo's signature attack in his incarnation from Diablo II. It is also known as Lightning Inferno. In Heroes of the Storm, it's known as Lightning Breath.
When using it, Diablo projects a stream of Lightning damage in a fashion much like the Sorceress' Inferno and the Druid's Arctic Blast. Unlike other spells used by monsters, it deals Physical and Lightning damage. Players caught in this deadly stream of destruction must make haste to get out of its path (which can be difficult, as he will usually grab his target directly after initiating the attack). Before Diablo initiates the attack, he raises his right hand in a manner similar to his Cold Touch attack, but his palm does not glow blue. Many players know this attack as Diablo's most deadly skill. Players using shields can block the physical part of this attack.
This attack makes a return in Diablo III. It is seen in Phase 3 in the final duel against Diablo and, unlike his previous incarnation, he takes a deep breath and launches a cone of lightning from his mouth.
Tip[]
In Hell difficulty, if you stand close enough to Diablo, his attack won't hit you because the damage originates past the character.
Damaging Skills
Fire — Fire Arrow • Fireball • Fire Bolt • Fire Hit • Firestorm • Fire Wall • Flame Circle • Hydra • Incineration Nova • Inferno • Meteor
Ice — Arctic Blast • Blizzard • Cold Touch • Fire Hit (Cold) • Freezing Charge • Glacial Spike • Hoarfrost
Poison — Poison Bolt • Poison Breath • Poison Cloud • Poison Spit • Poison Spray • Poison Sting • Poison Strike
Lightning — Lightning • Lightning Arrow • Lightning Globe • Red Lightning Hose • Shocking Hit • Spark Defense
Physical — Blow Dart • Charge • Corpse Cannon • Destructive Strike • Ground Tentacle • Leap • Leech-life Ball • Quill Dart • Slam
Magic — Bone Spirit • Hellish Projectile • Unholy Bolt
Non-damaging Skills
Indirect Attack — Blood Mana • Curses • Mana Rift • Minion Frenzy • Putrify • Spin Web • Stun
Spawning — Bone Prison • Festering Appendages • Lay Egg • Revive • Summon Minion
Self-effect — Bone Armor • Burrow • Fly • Frenzy • Heal • Teleport • Vile Effigy