Chromatic Usurper

Ingest, Wasteswalk

If Chromatic Usurper is your commander, you may
choose a color when building your deck and add it
to your color identity. If you do, start with 30 life.

{5}, {t}: Exile target permanent that has a color
Chromatic Usurper doesn't unless its controller
pays 5 life. Chromatic Usurper becomes that color
in addition to its others.
"..... Mine!"