Talk:Cho'Gath/@comment-28489976-20160518120714/@comment-5211662-20160901072304

Void Staff is still necessary in a full AP build, especially if Cho'Gath is the main source of magic damage of his team. While his true damage make up for a good portion of his damage, the majority of his damage is still magic (according to champion.gg 75% of his damage is magic, with true damage being only 18% of his overall damage, although they do not list full AP builds as the most popular for Cho). He needs magic penetration to make all of his magic damage worth. While it is true that, for obvious reasons, his true damage will not benefit from magic penetration, one can argue that with magic penetration making his base abilities hurt more, you will have better chances of getting the enemy under the health threshold needed to kill them with his ult. Plus, Cho'Gath has insane base damage with his Q and W, which makes magic penetration even better on him than it actually seems to be at first.

This makes Void Staff a good item in AP focused builds. However, because of his true damage and insane bases and scalings, it may not actually be necessary to get this item until late game, where you still need to get this to deal with the enemy stacking magic resistance. While Void Staff may seem like a weird option for tanky builds, because of Cho'Gath's bases, and the fact that the majority of his damage is still magic, Void Staff is probably a viable option for tanky builds too (not full tank builds, of course).