https://www.youtube.com/watch?v=zM06BBYMzgE&t=5s
I'm pretty sure I've covered everything needed to cover in the video. If I missed something, my apologies, but I think this is more than adequate for beginners, and even decent for intermediate/advanced players.

Unicorn Lancer is a pretty underrated hero in lost saga, and I think he deserved a guide so that people can learn him and use him more often. I'd like to see more people try him out, just to mess around with him if not for anything else.