SYONIDE

Batman and the Outsiders #19"Who's Afraid of the Big Red S?"

Earliest catalogued appearance of Syonide.

Mar 1985

No listings

Batman and the Outsiders #20"The Truth About Halo Part 2: Death And Rememberance"

Apr 1985

No listings

Batman and the Outsiders #22"The Truth About Halo Part 3: What She Is And How She Came To Be"

Jun 1985

No listings

Secret Origins #6

Sep 1986

No listings

Who's Who: The Definitive Directory of the DC Universe #22

Dec 1986

No listings

Flash Annual #4

Oct 1991

No listings

Outsiders #16

Mar 1995

No listings

Action Comics #817"Weapons Of Revelation"

Sep 2004

No listings

Action Comics #818"Enemies As Numerous As Grains Of Sand"

Oct 2004

No listings

Firestorm #17

Earliest catalogued appearance of Gehenna.

Nov 2005

No listings

Justice League Unlimited #15

Mar 2026

No listings