Mike Costa
Mike Costa is credited as writer on 185 issues in grailworth's catalog, 95 issues of them across 22 series we value. Characters first seen in issues they wrote or drew include Magus and Maniac.
Characters they introduced
Every issue
A+X (2012) 1 issue
All-New X-Men Special (2013) 1 issue
Amazing Spider-Man (2015) 3 issues
Avengers: Millennium (2015) 1 issue
Cobra (2012) 3 issues
G.I. Joe (2008) 1 issue
G.I. Joe: Cobra (2011) 3 issues
Hack/Slash (2011) 1 issue
Scarlet Spiders (2015) 3 issues
The Transformers (2009) 25 issues
World of Warcraft Special (2010) 1 issue
Credits from the Grand Comics Database, CC BY-SA 4.0.