The two-episode OVA series for Ikki Tousen: Extravaganza Epoch came out back in 2014 and is finally getting some domestic streaming as Crunchyroll has picked up the show.
The two episodes have gone live on the service which you can find listed as the sixth season here.
The OVAs were produced at ARMS and are directed by Masashi Kudo based on the screenplay by Masahiro Okubo and character designs by Rin-Sin.