Here are my thoughts:
1. Unquilt, unsew that block, sew a new piece of fabric, re-quilt. Lots of work.
2. Buy some Bo-Nash fusible powder, carefully pull the torn edges up from the batting and sprinkle the fusible powder all around the tear. Arrange the torn fabric as best you can, put a piece of parchment over the area (to protect your iron from the fusible), and press with a hot iron. The fusible powder will fuse the fabric to the batting. Then you can do a zigzag or some other repair stitch over the tear. Use invisible thread, if you'd like.
3. Similar to fusible powder, except you use fusible thread. Stitch the area closed, then place parchment over the area, press.
4. Break down and use an applique.
Ideas # 2 and 3 work very well if your fabric is a dark, busy print.
Last edited by Peckish; 09-17-2017 at 12:34 PM.