
Sebastion Gilberti
A card-carrying member of the X-Men corner of the Marvel Universe, Sebastion Gilberti made his entrance in The Uncanny X-Men #333 in 1996 — right in the thick of the Modern Age, when Marvel's mutant titles were among the most hotly followed books on the stands. Created by Scott Lobdell and Pascual Ferry, he's a figure who moves through some seriously charged company: Wolverine, Cyclops, and the ominous Bastion all share his pages across runs in X-Men, The Uncanny X-Men, and Cable. With 42 appearances stretching across a remarkable 25-year span into 2021, Sebastion Gilberti is one of those rewarding deep-cuts that dedicated X-fans love to track down — a persistent presence in the mythology that rewards anyone willing to dig into the era's rich, sprawling storytelling.

Trivia
- Bastion debuted under the alias Sebastion Gilberti as a shadowy government insider, with his true nature parceled out across multiple X-Men issues rather than delivered in any single, tidy origin story.marvel.fandom.com
- Marvel eventually established him as a hybrid of Master Mold and Nimrod, making him one of the franchise's most singular villain concepts — a human-facing synthesis of two distinct Sentinel legacies fused into one.marvel.fandom.com
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Covers through the years — 1996–2017
1996
1998
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2009
2015
2017