Wispweaver Angel | Mercurial Pretender

Cards

Cast
Mercurial Pretender by paying ({4} magic symbol) ({U} magic symbol) , choosing to have it enter the battlefield as a copy of
Wispweaver Angel.
When
Mercurial Pretender enters the battlefield, it triggers, blinking
Wispweaver Angel.
When
Wispweaver Angel enters the battlefield, it triggers, blinking
Mercurial Pretender, with
Mercurial Pretender entering the battlefield as a copy of
Wispweaver Angel.
Repeat from step 2.