CrossFlowX™: Working Towards One-Legged Crow. 51 minutes. If you are looking for a challenge, look no further. Eka Pada Bakasana requires an immense amount of core and arm strength, and this flow helps you build them. 2 blocks and a yoga strap are used in this video. Pillows, or a soft landing pad are recommended! As always: it's the journey, not the destination. It's never about the pose, it's what we learn along the way! Deep breaths, and have FUN!