*** During the attempt of Lucas to kidnap Malia ***
When Booth Rogers decided to help the hunters on the roof deck, he used the elevator.
A feeling of doubt and nervous if he should leave Malia on the lobby but he felt complacent because she will be surrounded with her fellow hunters down in the lobby.
Not expecting anything bad may happen on Malia if he left her with the other hunters on the lobby.
Using the elevator going to the roof deck gave him time to prepare his anti-magic weapon.
Which was cased in a long black container.
Each high ranking member of the Rogers Family had their own anti-magic weapon which they use for battle.
Only few had the opportunity to wield such powerful weapon.
In Booth Rogers' case, he was blessed with a double ended sword.