Mark of power / Barbara Kesel, writer ; Ben Lai, penciler ; Ray Lai, inker ; Wil Quintana, colorist ; Dave Lanphear, letterer ; the CrossGen Universe created by Mark Alessi & Gina M. Villa.
Vol. 1 has: "Originally published in single magazine form as Sigl, Vol. 1, issues #1-#7"--Indicia
Summary
Sam was nobody special, just another washed-up ex-commando looking for work on the wrong side of the gaming tables on the pleasure world of Tanipal. Then all hell broke loose in the form of an alien attack. Sam's best friend was killed, Tanipal was decimated and Sam was left with a mark on his chest which gave him incredible power.