AVENGERS (1963) #361

Ikaris of the Eternals arrives to bring Sersei back home, but it ends with Sersei becoming soul-bonded with Black Knight. But then why is Black Knight hitting on Crystal? The Eternals come to Avengers Mansion for Sersi and reveal their suspicions on what plagues her. The Avengers are told of the Mahd W’yry, a madness that is said to claim Eternals when they have simply lived too long for their minds to process. By Eternal custom, she is to be put to death. When this is something the Avengers will clearly not allow, Ikaris forces Black Knight to become Sersi’s Gann Josin, her soulmate and the recipient of a mental bond.…