Arcane Episode 6 - When These Walls Come Tumbling Down Episode Title: When These Walls Come Tumbling Down. Episode Description: After Viktor collapses in the lab from his illness, he and Jayce begin to study the "Hexcore", a new Hextech machine that reacts to organic matter and can potentially cure him. Heimerdinger tries to have it destroyed due to its potential danger, prompting Jayce to betray him and orchestrate his firing from the council. Viktor approaches Singed, his childhood mentor, to help perfect the Hexcore. Marcus is ordered by Silco to kill Caitlyn and Vi and, knowing this conflict will lead to a battle with Zaun, he prepares Piltover's defenses...