The manticore lashes its tail and grins with it's double-set of jaws. Charming beast.

"That's my patronus. It's an external expression of a happy memory that can be used to fight off similar constructs made from sadness or torment," he replies settling into what sounds like a talk he's given many times before. It's not a great leap to assume that Sebastian once taught this sort of magic. "There are different sorts -- a proper wizard uses a wand and theirs is a bit less solid, by changing the media to blood, you can create a stronger, more battle-ready sort, or if you imbue it with breath, you can create a messenger."