Elesh Norn, the Savior

0: Put a loaylty counter on Elesh Norn, the savior for each artifact creature you control.
-4: Destroy all nonartifact creatures. For each creature destroyed this way, its controller gains 2 life.
-7: You get an emblem with "Permanents you control are colorless artifact creatures in addition to their other types and get +2/+2."