"The Courage to Choose" is the third and last issue in the Interval, and the number 15 overall issue of W.I.T.C.H.
Cornelia absorbs all of the powers of the W.I.T.C.H. girls and tries to use them to bring Caleb back to life, but is interrupted by Luba. After she succeeds in bringing Caleb back to life, she gives the other Guardians their powers back and Luba disappears without a trace.
After the Altermere fuses with Cornelia, giving her all the powers of the five Guardians, she makes several attempts to transform Caleb, who is currently a flower, back into a human. Luba then pays Cornelia a visit and threatens to take away Cornelia's power over Earth away forever if she didn't surrender Caleb. Infuriated, Cornelia bound Luba in vines, which Luba disintegrated with her staff. Luba then transported Cornelia, Caleb and herself to Kandrakar and left Cornelia in a room to decide her fate. Cornelia still had her immense power and transformed Caleb back into a Murmerer, except he was seemingly mindless, not changing expression or moving at all. Cornelia cried over his motionless body and when a tear landed on him, he transformed back into his human form. Cornelia and Caleb stood trial, where the other Guardians got their powers back and Cornelia was reduced to just her Earth power. Caleb then stated that he was no Murmerer to Phobos and swore to be a loyal servant of Kandrakar. Luba was then enraged, saying that she would not allow Caleb to join Kandrakar and lunged at Cornelia and Caleb. Caleb forced her back, knocking Luba to the ground. Luba then told the Oracle that this is the end of Kandrakar and that she was not going to stick around and save it. She then vanished and Caleb was given an assignment to locate Luba and return her to Kandrakar unharmed.