Link Origin

A Link Origin (リンク元（もと） Rinku Moto) is a Link Monster that has a Link Arrow pointing to another Monster Card or Monster Zone.

The term was first defined in Perfect Rulebook 2017 as one of the new gameplay terms that were introduced with Link Summoning; however, it was never used in any card text. As of Perfect Rulebook 2020, the term is not mentioned anymore, presumably meaning it has been deprecated.