The only reason this isnt higher up is that it takes a bit of set up to make work
Before we go into arguments I've heard against this card, let's look at a mostly-Green 3-0 deck that where someone had Rishkar and his expertise: Rishkar, Peema Renegade Example
Mishra's Factory is still a fine card and has plenty of application but it is far from an auto include in aggro lists, even mono coloured ones (apart from the fact there are often other better colourless lands options on offer)
From here, select the Decks button, which is one of the three small tabs located at the top of the page
Pantlaza, Sun-Favored Pantlaza, Sun-Favored[/card] According to EDHrec, Pantlaza, Sun-Favored is currently the #6 most popular commander, period
With Zevlor, that simply wont be the case