Soul Docking

is a technique used by the Quincy, Uryū Ishida, with assistance from Ichigo Kurosaki.

Description
By making contact with Ichigo Kurosaki's original Zanpakutō, Uryū can channel the immense Reiryoku flowing through it into his Heilig Bogen, Kojaku; this not only drastically enlarges the bow itself, but theoretically allows Uryū to fire massive and substantially more powerful Heilig Pfeil as well.