for me is the same Doumeki and they talking about Haruka, because my sanity demand it!!!
and because there is non other Doumeki who is linked by a sharing eye who can protect him and know when use the egg

SO the egg gives Doumeki eternal life until he use the egg in order to be at Watanuki's side!

TARAN!!!

thanks for all your translations!!

and Yuuko is happy ever after with her Clow Reed in the after life, in other dimension, time, or whatever