That could also work, and with the snow storm, he could pretend to get lost and separate from Maker, using the chance to "change clothes" and try to assassinate her like a different person. If he gets found by someone else while trying to assassinate, he could try and fake being unconscious or something along with giving himself a "convincing" injury.
Unless you want him to be found out during the attempt that is.
Edit: Zorua could even use her illusion skills too. (Yes, I know she can only disguise herself until she evolves.)