Well lets see I call the early game everything that leads to Champ lvl 6 for u personally wether you are behind or ahead 1-6 is early 7-11 is mid and 12-18 is end game.Ok lets get started buying one amplifying tome and one health or mana pot is my favorite start your first talent should go to [W] it allows u to coral your lane and makes your opponent weary. It also then sets u up for Your [Q] keeping pressure applied and then lvl 3 you get your [E] heres when she gets fun. Due to the way Cass is set up you can use either your Q>W to poison your target and then you can spam your E for an early kill provided the right situation occurs. If u miss this chance its fine upon reaching lvl 6 you can use your ulti for easy face melts try and use your ulti on champs dumb enough to risk your poison pools and clouds so as to further the pain with your [E]. Rinse repeat.

Ah the middle the stuff that makes the samwhich taste great or fail. by now u should have one to Two kills easy regardless of what lane your in (normally mid or bot) "if bot your a mock support taking advantage of the normal sup/adc method". this is the bit that lets u know if u have got off the ground or not before lvl 11 you should have at least the first tower down. this is accomplished with grace mostly u poke the turret placement or it's base with your poison pool's allowing your adc to pump the turret relatively harassment free. something they will love and you for.all building to the End game. Now there are some checkpoints that are a must here you should Already have your Archangels Staff and the white cog on your boots... a must at this point rinse repeat till the end game.

Here she goes at this point you should be in the swing of things returning to base here and there to ensure survival with homegaurd cog on your boots for fast manna and health in pinches. at this point you should know your role if you have taken charge its your duty to group support in an offensive manner if you have fallen behind its your job to use your placement and ulti to ensure your groups odds and remember Your Ulti is a bit tough to manage but it can be used as a slow if u cant get them face on for the stun. Use all your Dirty tricks that you will no doubt have picked up by now and Let Them Look Death In the Eye!