After surviving the Anti-Grendels and a double vampire attack, Grendel Prime, Ptolemy, and Hari Smythe finally make it to the Grendel Grotto, the base of the Hounds of Orion. With Grendel Primes help, they may be able to finalize a special experiment thats taken years to developan experiment that could change everything! A new Grendel story arc from visionary creator Matt Wagner! Four issue series.