Animate Norse Banner with Glowing Aurora

Animate this single source image into a seamless, smoothly looping animated GIF. Keep the central Norse frame completely stationary while adding a continuous, fluid motion effect to the green, purple, and teal aurora borealis energy surrounding it. Preserve full alpha-channel transparency on the background grid, ensuring no solid colors or artifacts fill the transparent regions. The final loop should transition flawlessly back to the start frame with zero jarring cuts.