Deal 3 damage to ALL characters.
It's spells like these that make it hard for Warlocks to get decent help.
 How to get
Hellfire x 2 are automatically included in all players' collections.
Hellfire is one of the strongest board wipes in the game but its use must be carefully weighed.
It is also important to remember that Hellfire not only damages all characters on the field, but also yourself and your opponent directly.
Hellfire is a channeled warlock spell which causes a small amount of damage to all nearby hostile targets - as well as the warlock themselves - every second while it is being channeled. The spell is commonly used to clear weak "trash" mobs, although the warlock will likely need healing in order to ensure they do not themselves succumb to the spell's damage.