Sybil (Oracle, Marvel)
Sybil (Oracle, Marvel) appears in 10 issues in grailworth's catalog, and was first published in 1977. Key issues with Sybil include X-Men #137 (1963).
Key issues
Every appearance we value
Classic X-Men (1986) 2 issues
What If? (1977) 1 issue
Character appearances from the Grand Comics Database, CC BY-SA 4.0.