Velior, King of Carmaton

Chivalry 3 (When this creature attacks, you may
tap an untapped creature you control with lesser power.
If you do, this creature gets +3/+3 until end of turn.)
Other creatures you control have vigilance and chivalry 1.
At the beginning of your end step, Velior, King
of Carmaton deals damage to any target equal to
the number of tapped creatures you control.