Queen Ayrenn of Alinor

When Queen Ayrenn of Alinor enters the
battlefield, you become the monarch.
Whenever you attack, create a 1/1 green and
white Elf Warrior creature token. Then if you
are the monarch, each Elf you control gains
exalted until end of turn. (Whenever a creature
you control attacks alone, it gets +1/+1 until end of
turn for each instance of exalted among permanents
you control.)