*Silver Surfer vs. Thanos: Realizing that the Silver Surfer was the primary threat to his genocidal plan of killing half the intelligent beings in the universe, the mad titan Thanos tried to destroy him. But in the battle that ensued, the Surfer was triumphant, and was instrumental in Thanos's eventual--if temporary--downfall!
First Encounter: Silver Surfer Vol. 3 #34, February 1990
*Source: Back of card