Veigar has the unique ability to buy absolutely any item and at the same time have a huge amount of ability power. Your passive ability allows you to become a tank and have as much AP as a normal mage. About eight hundred after the purchase of Rabadon. On the line, you can easily participate in trades immediately after purchasing the first item. Up to this point, you are saved by resistances in rune shards and bone plates. If your jungler helps you get a couple of kills or even assists, you will get a nice boost to your strength. 5 AP for each assist, 150 gold, which will allow you to quickly buy a mythic and a free lane with farm. The rest of the game goes exactly the same. The main mythic will be Turbo Chemtank. It will replace the Predator rune for us and will allow us to make roams on the mid. You can also try to go mid with this build, but against strong mages it will be a little more difficult.
I think this build is so broken. For example, Sett can't destroy you like a banal bruzer, you don't have enough HP for his Q to inflict huge damage on you. In addition, bone plates save you. Sett is also quite slow to dodge your E. He only gains mobility when moving towards you if he pressed the Q, but it is enough to put a cage in his path and he will abruptly change his mind about hitting you.