Mural of Revelation

This acts as an Emblem
At the beginning of every main phase {t}
you gain X life where X is the amount of life
taken away with this mural divided by the number
of murals you control
At the end of every main phase {ut} and every
opponent loses 1 life Whenever you
untap this mural, choose one: create a
world angel or world alligator planeswalker