[s2e24] Mortal Folly -

is the 24th episode of Adventure Time 's second season and serves as the first part of the high-stakes season finale. It is widely recognized for introducing The Lich , the series' most powerful and menacing antagonist. Episode Overview Original Air Date: May 2, 2011.

After the ancient evil known as The Lich is accidentally freed from his amber prison, Finn and Jake embark on a perilous quest to stop him from reaching his full power. [S2E24] Mortal Folly

While Finn and Jake are focused on the world-ending threat, they are constantly interrupted by the Ice King , who is desperate for their "blessing" to marry Princess Bubblegum. is the 24th episode of Adventure Time 's