Azoki, Azorius Incarnate

Vigilance, flying, first strike
Whenever a creature you control enters the battlefield, detain target creature.
Eminence -- As long as Azoki is in the command zone or on the battlefield, white creatures you control have vigilance, blue creatures you control have first strike, white and blue creatures you control have flying, and creatures you control with the Azorius signet on them cost {w/u}{1} less to cast.
Azorius goes farther than law.