User blog comment:Sifter66/What makes a late-game champion?/@comment-4022742-20150601094656

Champions with very specific scaling tend to be strong in the late game, power that usually only shows itself when they reach level 18. Examples of champions like this are: In my eyes it is primarily the champions that rely on their team to get the ball rolling. Champions like might be strong throughout the game and completely demolish a little Kog. But when teamfights happen and he is prevented from catching his axes his damage drops, Kog doesn't have that limitation, only growing stronger and stronger.
 * who gets more range and becomes a safer carry as the game goes on.
 * whose on-hit damage scales with attack speed and AP, while also needing Lifesteal to really shine in battles.

It is pretty match specific though. If you have no Hard CC in your team, letting Nasus farm top 24/7 guarantees you a late game wipe-out. Most champions can only hard carry with pre-set conditions.