The promo video for episode 15 of "Arrow" is already released, and it confirms that Oliver Queen will get help from a stunning ally – Vixen.

The buzz over the upcoming crossover began when the CW released images of Vixen in action in the current season of "Arrow." According to ComicBook, this is the first live-action appearance of Vixen, played by Megalyn Echikunwoke.

Vixen can get the help of animals, borrowing their powers. Arrow and Vixen will team up to track down Damien Darhk, who allegedly kidnapped Oliver's son, William. Oliver will also have to bare it all to Felicity, who is preparing for their wedding.

Meanwhile, in addition to saving his son, Oliver must also continue trying to win the mayoral election, as members of the Demolition Team continue to cook up ways to hand over the win to Oliver's opponent.

In the tag released with the promo images, it is stated that episode 15 will have fans see the two "finally going to war." The synopsis reads, "Oliver (Stephen Amell) realizes he needs help battling Darhk (guest star Neal McDonough) so he calls in an old friend – Vixen (guest star Megalyn E.K.). Using her magical ability to summon animal powers, Vixen gets a lock on Darhk's location and the team goes to war. Meanwhile, Thea (Willa Holland) has a heart-to-heart talk with Malcolm (John Barrowman).

Episode 15 is titled "Taken" and will air on Feb. 24, 8 p.m. ET on The CW.

The Arrow-Vixen crossover has already happened previously, as noted by MovieWeb. However, it was only for the "Vixen" web series, with "Arrow" and "The Flash" actors Stephen Amell and Grant Gustin reprising their roles for the voice overs. Meanwhile, Echikunwoke previously starred in movies, best known for her appearances in "Damsels in Distress" and "A Good Day to Die Hard."