User blog comment:Lukeatlook/Never Go Full Meta/@comment-5284325-20140713142914/@comment-15244341-20140713193553

Dota won't grow in items or champions (ok, it will get updated with the champions that are not in it), but it sure as hell changes. The heroes' and items' nerfs and buffs shift their viability in an amazing way. Best example I can thing of is the semi recent buff to Mjollnir. The item was sort of a Shiv in that in gave attack speed (a lot, actually) and a passive chance to proc a lightning not unlike LoL's equivalent plus some amount of damage. It was an OK item in some champions, though not that great in general. However, when the lightning proc got changed to activating in a cone to activating in a huge AoE, the item suddenly got spammed. Same happened to the active of the items evolution (same new targeting) which was a "shield" that procced that lightning on a hero being hit. Now the item is so regularly spammed that it had to get some nerfs.