He first appeared (named Seamus Melloncamp) in Uncanny X-Men #300, created by Scott Lobdell and John Romita, Jr..
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It is revealed that he was killed during the Sentinel assault on Genosha, as he has been revived by Selene during the Necrosha event.
Seamus Heaney | John Mellencamp | Seamus Blake | Seamus O'Neill | Seamus Blackley | Seamus Mallon | Séamus Ryan | Seamus McNamara | Séamus Ennis | Seamus Ennis | Séamus Egan | Seamus Egan | Séamus Cunningham | Séamus Qualter | Seamus O'Sullivan | Seamus O'Kane | Seamus McSporran | Seamus McGarvey | SEAMUS Lifetime Achievement Award | Seamus Leydon | Seamus Kennedy | Seamus Haji | Seamus Elliott | Seamus Deane | Seamus Daly |