King's Banner

Creature you control have +1/+1 and vigilance.
If you're not the King, creature you control have lifelink. If you're the King, creatures you control have myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token that's a copy of this creature that's tapped and attacking that player or a planeswalker he or she controls. If one or more tokens are created this way, exile the tokens at end of
combat.)