Krator, the Dark Paladin

Indestructible, Menace
When Krator, the Dark Paladin enters the battlefield switch to Dark.
Light: Krator, the Dark Paladin looses Indestructible and Menace, but costs {5} less to cast.
Dark: Krator, the Dark Paladin must be blocked if able.
Partner (You can have two commanders if both have partner.)