Morophon, Former of Tribes

Changeling.
Morophon, Formor of Tribes costs {1} less for
each type among creatures you control without
changeling and {2} less for each creature you
control with changeling.
{w}{u}{b}{r}{g}: Name X keywords where X is the
number of creature types among creatures you
control without changeling. Other creatures you control gain those keywords until the end of the
turn.