Under the Shadow of Wings is the title of a book-length philosophical essay by Maurice Maeterlinck. It means, I suppose, that we all live under the threat of inevitable death. And within that context we have choices to make and reactions to have. Both plays (Death of Tintagiles and Karna and Kunti) reflect this reality. In both death and doom are inevitable, but we have existential choices and the plays depict some of those, which lead to enhanced human dignity and also despair.