Ayanokoji, The mastermind

When Ayanokoji, the mastermind enters the battlefield look at the top four card of opponents library, choose one and play it under your
control until Ayanokoji, the mastermind leave the battlefield, when it die Ayanokoji, the mastermind obtain his keywords
Ayanokoji, the mastermind can't attack alone; Ayanokoji, the mastermind can't be blocked
when Ayanokoji, the mastermind attack with one
or more creature, they have Ayanokoji, the mastermind keywords