Siona, Captain of the Pyleas

When Siona, Captain of the Pyleas enters the battlefield, look at the top seven cards of your
library. You may reveal an Aura card from
among them and put it into your hand. Put the
rest on the bottom of your library in a random
order.
Whenever an Aura you control becomes attached
to a creature you control, create a 1/1 white
Human Soldier creature token.