Mystic Aura

A Hamato Clan ancestor (credited as Mystic Aura) appeared in the Rise of the Teenage Mutant Ninja Turtles episode End Game when consulted his scrolls on his next step of action. Splinter's deliemma was whether to give his teapot (actually the final piece of the Kuroi Yōroi) to and save his captured  in exchange for dooming humanity, or to not give up the final piece and keep humanity safe at the cost of losing the Turtles. His ancestor urged that his destiny was for the latter to take place. Splinter realized how unacceptable it was to give up his sons and shredded the scrolls in anger. He then chose a third option - to go and save the Turtles himself.

Trivia

 * The Hamato Clan ancestor is voiced by Hoon Lee, who was the voice of /Splinter himself in.