Not Updated For Current Season
this is my guid from veigar....
beginn of the game:
first do nice last hitting with ur Q spell to get more AP
and steck ur tear of the goddess up for more mana (archangels passiv : more mana more ap)
get kills for gold ! (ganks...)
and look for ap player of the other team when they have ap u make more dmg !!!
u are a maschine :P
Be carefull with veigar he have low health !
i took ghost because he is so slow and teleport that he come fast on the line for farming
with the mana reg runes u don t need a clerety u have a nice passiv reg and the runes are enough.
when the other team have high life champions take a deathfire grasp because of his passiv
when u see u are the focus of the other team and get very much dmg buy a zhonyas ring it will help u when they want 2 focus u, u go in zhonyas so they do the spells on other campions and u have a easy fight ;)
i hope it will help u a little bit ;)