Demonheart

Demonheart is an epic warlock spell card, from the Goblins vs Gnomes set.

Strategy
Dealing 5 damage is straightforward, but since the buff is enormous and Demons generally have some backlash for playing them, losing it is often a double-whammy. Blood Imp is an excellent candidate; its low cost and Stealth allow you to keep its effect running until you need to use the Attack boost. The tanky Queen of Pain will heal for huge amounts before going down. You can use it with Shadowflame for unexpected field wipes, but this is very expensive, wastes the Health and Power Overwhelming serves this purpose better.

Trivia

 * The artwork for this card comes from the World of Warcraft Trading Card Game "War of the Ancients" series, for the card Demonic Infusion.

Patch changes
Added.