‘Arrow’ Season 3 Episode 21 Promo & Spoilers: What to Expect in 'Al Sah-Him'

In the last episode of "Arrow," Oliver Queen finally went to Ra's Al Ghul to resurrect his sister, Thea, but as payment for what he's asking of the Head of the Demon, he had to give him his services as part of the League of Assassins. The cosequence of his action, according to Design & Trend, will be seen in the next episode titled "Al Sah-Him".

The official synopsis read, "In 'Al Sah-Him', Oliver (Stephen Amell) goes through a rigorous transformation. The League of Assassins sets its sites on Nyssa (guest star Katrina Law), who is back in Starling City training Laurel (Katie Cassidy). When Nyssa realizes they are coming, she arms up to face them alone but Laurel asks Felicity (Emily Bett Rickards) and Diggle (David Ramsey) to help protect her new friend.."

Design & Trend continued on to say that as per the promo for next episode, it looks like Oliver will have to fight his team to be inducted into the league. When he asked Ra's Ah Ghul at the beginning of the episode about what the league's leader wanted him to do, he said that he wanted Oliver to "eliminate a threat." By the end of the short clip, he was staring at a helpless Diggle. Spoilers suggest that a major character will die by the end of the season, with Christian Today suggesting that it could be Diggle or Felicity receiving the end of Ra's Al Ghul's blade. Could it be Oliver taking the life of his friend in Ra's name?

According to producer Mark Guggenheim, the events of the final episode will go well into the fourth seasns, saying, "It's something you will continue to see not just through the end of season three, but into season four."

"Arrow" star Stephen Amell already tweeted about the finale episode. He wrote, "It's our last day of Season 3. Like the last day of Season 1 and Season 2... I'm going out fighting."

Synopsis for the last episodes have also been released, and from the looks of it, Oliver will go through a rigorous transformation before he ascends as Heir to the Demon. The International Business Times noted that a surprise return of fan favorite characters will also be expected, including Colton Hayes, who played the role of Roy / Arrow's sidekick, Arsenal.

Are you excited for the last three episodes of Arrow? Do you think Oliver will really stay in the League of Assassins, or will he be back to his green-hooded persona by the end of the season?