"World Tour, 1 of 4: !Hasta la Vortex, Baby!"
*It's the crossover to end all crossovers! The Mask takes a whirlwind tour of the Dark Horse Heroes' universe, and he starts by butting heads with Hero Zero! Can Hero Zero take the punishment? Will the Mask survive a mystical onslaught of King Tiger? The world of the Dark Horse Heroes may never be the same again. *Source: darkhorse.com