Zarael, Goldhorn Protector

When Zarael, Goldhorn Protector enters the battlefield, create a 1/1 white Unicorn creature token.
Other Unicorns you control get +1/+1 and have indestructible.
{2}{g}: All creatures able to block target Unicorn this turn must do so.
''No horn shall be broken nor any hide flayed. This I pledge.''