History
After winning the Nobel Prize, Dr. Hans Feldstadt retired to Jungfrau in a sabbatical to continue his experiments undisturbed, under the alias of Dr. Klein. An encounter with Hulk led to Feldstadt's Gamma-based mutation and eventual death.[1]
When the Marquis of Death appeared on Earth-616, the Jungfrau's glaciers blistered in volcanic ulcers.[2]