Trace a copy of your basic block.
First, flare the hem by 3-4cm on sides and center back. Then shape center back by 2cm at waistline.
Draw the new neckline:
- on front, draw the deep V neckline, the princess cut ending at armhole for dart manipulation and the raglan-like cut
- on back, from armpit to center, very slightly curved. Then, discard 1cm from the dart extending it up to neckline. Draw also back collar.
Merge back collar to front neckline.