Supernatural Season 8 Spoilers: Misha Collins on Castiel's Power Problem and Whether He's a Unicorn at Comic-Con 2012 (VIDEO) Tweet July 16, 2012 by Jenny McGrath Related: Wetpaint Entertainment, Comic-Con 2012 Credit: Wetpaint Entertainment On July 14, Supernatural's Misha Collins talked to reporters at the San Diego Comic-Con 2012. He teased that we'll first see Castiel in a flashback in Season 8 and said his powerful character is actually a unicorn. (We wish!) Fall in Like with us! For the latest from Wetpaint Entertainment, Like us on our Facebook page at Facebook.com/Wetpaint, or follow us on Twitter at Twitter.com/WetpaintTV.