# Ultimate Comics X-Men (2010) #21

Published: 2013-01-09T00:00:00+0000
Series: Ultimate Comics X-Men (2010 - 2013)
Creators: Carlo Barberi (penciler), Michael Ryan (penciler), Virtual Calligr (letterer), Mark Paniccia (editor), David Baldeon (penciler), Juan Francisco Velasco (cover artist), RAFA SANDOVAL / ROGER BONET/JAVIER TARTAGLIA (colorist), Brian Wood (writer), Jordi Tarragona Garcia (cover artist), Nathan Edmondson (writer), Jesus Salvador Aburto Martinez (colorist)

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RESERVATION X continues! What is the Sentient Seed and why does everyone want it?