Olga of Kiev, Viking Saint

When Olga of Kiev, Viking Saint enters the battlefield, create a Gold token.
When Olga of Kiev attacks, you may pay {x}{r}. Olga of Kiev deals X damage to target creature
an opponent controls. {x} cannot be more than
the number of creatures you control.
{1}{u}, Sacrifice a Gold: Create a 1/1 white Viking creature token with First Strike.