Fiery Banner

When Fiery Banner enters the battlefield, it deals 10 damage to each creature. If a creature is not destroyed this way, exile it instead.
Creatures you control have haste.
If you're the King, creatures you control have first strike and "{r}: This creature gets +1/+0 until end of turn,". If you're not the King, creatures you control get +2/+0 and double strike.