Rias Gremory

Ward {x}(X is equal to Devils you control), Flying
For every Devil that is on the battlefield Rias
Gremory gets +2/+2
{t} Take control of target creature until Rias
Gremory leaves the battlefield, that creature
is also a devil in addition to it's other types
{p/b}{r} Put a 1/1 black Devil creature token
with flying and haste on the battlefield, activate
only as a sorcery