Love between light and night how to shed a brush with a bear cub how to shed a brush with a bear cub?

1, love between light and night, how to change the feather of Ursa Major: 300 Ursa Major = 1 quill pen, and change it directly on the card drawing page.

2. I know that Ursa Bear can be exchanged for quill pens, but the exchange is not on the shop page, but directly on the card drawing page.

3. Click "Extract" directly when drawing the card. If there is not enough quill pens, a pop-up window will pop up asking whether to switch to quill pens to draw cards. Click "OK".