Welcome to my build of Cassiopeia. Probably one of the most difficult champions to master and very underrated. This guide is still in progress.

Pros:
-Very low CD.
-Great harassment.
-Good in team fights. (If you're smart & keep your distance knowing when to use your ult)
-Unique Character, She can be a lot of fun once you learn how to play her.

Cons:
-She's prone to ganks and her CC isn't great so don't over extend. Stay with your team.
-She's very skill shot based, a difficult character to get used to.
-Without giving her survivability items, she's extremely squishy and usually focused in team fights.

Some of my stats over the past few days. I doubt I'll post more, but you get the hint. Play smart, and you'll always break out positive. In some cases, you'll break out to be a complete annoyance to the enemy team like I usually am ;)

As Cass, you don't wanna initiate. Keep your distance and just keep spamming your poison and twin fang on the squishy enemy champs. If you don't you'll more than likely get focused and die. When your team is starting to win or you notice most of their team is crowded together, use your ult. This will give you and your team such an advantage. Then just spam Q, E, E, to kill off all the low HP enemy champs. Your job is to just harass from the sidelines and help your team and come in when it's a sure victory. Don't jump in there like you're invincible because you're far from it. Remember, the only way you're going to die (unless your team sucks) is if you get greedy, careless, and arrogant. Play smart and communicate with your team.