To gain a formidable new card, Arthur must brave the unknown in a hive notorious for its evil side, as this thrilling deck-building fantasy continues. Having survived their journey into the Dark Heart, Arthur and his dragon, Brixaby, have a new goal: complete their Legendary card sets. Unfortunately, the next Legendary card is locked away in Blood Moon, a hive with a reputation for chaos, lawlessness, scourgling eruptions, and--rumor has it--dedicated dragon hunters. Still, Arthur and his retinue feel they have little to fear. Then again, they also don't have much knowledge of what actually lies ahead. What they find is a hive full of training and leadership opportunities--if they're able to avoid paying the blood price. But the lure of the Legendary card in the Blood Moon Hive may be a ruse. In fact, it could very well be a trap set by the scourglings themselves. Or something even worse . . . The fifth volume of the hit progression fantasy series, featuring a unique card-based magic system, now available for the first time in print!