My first comment, so hopefully I can be of some use in this.
Spoilers obviously, but...
Elizabeth did mention that when she was younger, she could create tears as well as exploit existing ones. Comstock had a "Cipher" installed to dampen/leash her powers.
At the end on the Hand of the Prophet, you instruct the Songbird to destroy it which restores Elizabeth's powers in full.
My first comment, so hopefully I can be of some use in this.
Spoilers obviously, but...
Elizabeth did mention that when she was younger, she could create tears as well as exploit existing ones. Comstock had a "Cipher" installed to dampen/leash her powers.
At the end on the Hand of the Prophet, you instruct the Songbird to destroy it which restores Elizabeth's powers in full.