Xeni will politely wait on that little transaction to occur, before rubbing his hands and stealing one of Kara's crackers.
She doesn't really seem to mind, instead pushing it a little closer to him, as she takes another to nibble on herself.

"Right then. Eat this cracker."
Said cracker is now an extremely violent hue of of yellow, and crackling with green sparks.
Which it most certainly wasn't doing a few seconds ago.

The mage holds out the cracker to the vampire.