I.S.A.A.C.

Few characters embody the cosmic side of Marvel quite like I.S.A.A.C., who made their debut in The Life of Captain Marvel in 1990, brought to life by the legendary Jim Starlin and Mike Friedrich — a creative pairing with deep roots in Marvel's outer-space mythology. Emerging at the cusp of the Copper and Modern Ages, this character has kept remarkable company across their publishing history, sharing pages with cosmic heavyweights like Captain Marvel, Drax the Destroyer, Mentor, A'Lars, and Rick Jones — a roster that signals serious engagement with Marvel's interstellar corner of the universe. Appearances across Avengers vs. Thanos and Essential Captain Marvel place I.S.A.A.C. firmly within some of the most celebrated cosmic storylines in the publisher's catalog, and a presence stretching all the way to 2018 speaks to a quiet but persistent staying power. For collectors drawn to the deeper reaches of Marvel's cosmos, I.S.A.A.C. is one of those rewarding discoveries hiding in plain sight.