Wispweaver Angel | Mirrorhall Mimic // Ghastly Mimicry

Cards

Cast
Mirrorhall Mimic by paying ({3} magic symbol) ({U} magic symbol) , choosing to have it enter the battlefield as a copy of
Wispweaver Angel.
When
Mirrorhall Mimic enters the battlefield, it triggers, blinking
Wispweaver Angel.
When
Wispweaver Angel enters the battlefield, it triggers, blinking
Mirrorhall Mimic, with
Mirrorhall Mimic entering the battlefield as a copy of
Wispweaver Angel.
Repeat from step 2.