Vampire's Allure

Creatures and creature spells you control are
black Vampires in addition to their other colors
and types. You may spend mana as though it were
mana of any color to cast Vampire spells and
activate abilities of Vampires you control. If a card
you control mentions a creature type it now
mentions Vampire instead.
Vampires you control get +1/+1 and have lifelink.
Vampire's Allure can be your commander.