Board Thread:Theories and Speculation/@comment-34277398-20180522015234/@comment-734582-20180522134744

Quadraticequation wrote: Didn’t Madara also tame Kurama with Sharingan. And that’s how he summoned Kurama? A summoning requires a contract, and a contract needs to be signed by both sides. Edo Tensei uses DNA for the other parties' signature. Madara needs to force Kurama into a contract using the Sharingan.