Senju DNA:
-The DNA from one of the strongest shinobis and-
It actually created a being (white zetsu) who was obssesed with poop.
It can shorten the 10 YEAR lapse between use of Kotoamatsukami into. Not half, not a Year, not a month but
into a day of rest between usage.
Its the only way known to tame the Juubi.