Fantastic Four #3 (1998 3rd Series)

With Giganto on the loose in New York City, SHIELD calls in the Avengers Captain America and Thor to aid the Fantastic Four in the battle. The two Avengers find themselves easily battered around by the creatures atomic breath, while the FF try in vein to stop Namor directly. Namor gains the upper hand when he is exposed to water which boosts his strength, knocking the thing clear thought a series of buildings. The Avengers then set in to stop Namor, and Captain America, recognizing Namor as an ally during World War II manages to talk the prince of Atlantis to stand down from fighting. Overhearing this conversation, Warlord Krang, who hoped Namor would perish in combat decides to convince the other Atlantean warriors that Namor has betrayed them.