Bleach, part of the Big 3 ... Asta wields a massive black sword with black energy, very reminiscent of Ichigo's Tensa Zangetsu. And Asta's transformation is inspired by Ichigo's Hollow transformation.

When looking at the entire catalog of Bankai that have been shown throughout Bleach's story, these are the fastest in terms of activation and effect. In the original manga, even though Unohana ...