Nonogram a puzzle inside a puzzle

Silver puzzle 19 of 25

7×7 nonogram · reveals silver cell row 4, column 4

2
7
21
2
1
2
0
3
3
1
1
1
5
111
SOLVED

It's a Key! Silver cell (4, 4) is revealed.

Click to fill · click a filled cell (or right-click) to mark ×, click again to erase. Drag to paint. Clues turn grey when their line matches. New here? Read how to play nonograms.