Cast Hulking Metamorph for its prototype cost by paying ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) , choosing to have it enter the battlefield as a copy of Wispweaver Angel.
When Hulking Metamorph enters the battlefield, it triggers, blinking Wispweaver Angel.
When Wispweaver Angel enters the battlefield, it triggers, blinking Hulking Metamorph, with Hulking Metamorph entering the battlefield as a copy of Wispweaver Angel.