Conversation so far:
What were Count Dracula's powers ?
Count Dracula can change form at will.
Did Count Dracula have any other powers besides being able to change form at will?
One of Count Dracula's powers is the ability to turn others into vampires by biting them.

Question: Are those all the powers he has?
Self-contained rewrite: Are being able to change form at will and the ability to turn others into vampires all the powers Count Dracula has?