Altered Ego + Wispweaver Angel

Prerequisites

You have enough mana to cast Altered Ego.

Steps

1. Cast Altered Ego by paying its mana cost, choosing to have it enter the battlefield as a copy of Wispweaver Angel
2. When Altered Ego enters the battlefield, it triggers, blinking Wispweaver Angel.
3. When Wispweaver Angel enters the battlefield, it triggers, blinking Altered Ego. Choose to have Altered Ego enter the battlefield as a copy of Wispweaver Angel.
4. Repeat from step 2.