Usman Dan Fodio, the Mujadid

First Strike
When Usman Dan Fodio, the Mujadid
enters the battlefield, you become the monarch.
As long as you are the monarch, creatures you
control get +1/+0 and have "whenever this
creature attacks, you may put a card with lesser
mana value onto the battlefield from your hand
tapped and attacking. Return it to your hand
at the beginning of the next end step."