“One of the benefits of being on Buffy the Vampire Slayer was that set dec gave me a bunch of Halloween stuff,” Hannigan revealed in the video. “They used to loan me things for Halloween and then when the show was over, they were like, ‘Just take it all.’”
Moving on to a massive cross made of metal and wood, the actress assured fans, “You might recognize this from Buffy” — but she wasn’t sure when it was featured. “You guys tell me. I bet you can tell me when you’ve seen this.”
Hannigan’s followers sure did. “Spike draped himself on that cross in season seven and began to sizzle and smoke!” confirmed an Instagram account called @BuffyProps.
In the scene, Buffy’s enemy-turned-lover (played by James Marsters) embraced the symbolic prop after revealing he got his soul back.
Source: Alyson Hannigan uses real ‘Buffy’ set pieces as Halloween decoration