This build will get you your ult up EVERY 30 SECONDS it is very very powerful late game. Endless slows and speed ups and your items are nicely used in conjuction for instance: ult someone they revive use mikael's and thier at about 1/2 hp and rdy to fight a little longer. I cant stress this enough though: FOR THE LOVE OF GOD IF YOU SEE SOMEONE COMING AT A CARRY SLOW HIM DOWN DONT SPEED YOUR CARRY DONT SPEED YOURSELF SLOW HIM YOU WILL BOTH GET AWAY. lvl try to get some harass out gey 3g from your autos with the new mastery if your solo ranked tell your carry not to push to hard early game because zil has 1 escape and it's his 55% speed increase and it lastt about 2.5 seconds and most times that's not enough. don't ult yourself during a fight it's very very stupid and selfish always try to use it on your carry. if your tank is engaging and no one eles is in any harm then you can ult him. your ult will change team fights and it's very nice for baiting and with your late game ap you will revive for about 1500-1600 health depend on what you get.

With teleport you can go to another lane to change thier battle make sure you always have map awarness because it could mean your other lane winning or losing.

pros: amazing amazing late game endless slows ult up every 30 seconds 1500-1600 hp

cons: very bad early game untill you get items: he is item dependent i've gone from 1/2/30 with him to 0/7/10 so communicate your actions, make sure you have teamates and don't hesitate to risk your life for your teamates the better they are the better you are.