As veigar, He will have a lot of Passive stacks during this phase of the game. This scaling is infinite, which means that Veigar can pretty much one-shot full health squishy targets.

His n will be on a very short cooldown during this point in the game. He will be able to secure a lot of picks, especially around choke points.

Once his Ultimate R gets maxed out, he will execute enemies with ease. Any enemy who gets hit by his e will be within Ultimate R kill range of Veigar. As veigar, It will have a lot of passive piles during this phase of the game. This scale is infinite, which means that Veigar can about a full-health squishy target shot. His n will be on a very short cooldown during this point in the game. He will be able to secure a lot of choices, especially around choking points. Once his ultimate R is maximized, he will execute the enemies with ease. Any enemy who gets hit by his e will be in Veigar's Ultimate R tuture range.