I was glancing through cards and I noticed this:
Soul of the Harvest
4GG
6/6
Trample
Whenever another non token creature enters the battlefield under your control, you may draw a card.
Yea, this is kind of old news. There has been a functional equivalent (for your purposes) in Primordial Sage for some time. No one uses this because, in Elves, you want your six-and-up drops to do something awesome when they connect. You want your draw engine to be cheap because you need your draw engine to come online FAST; that's the whole point of Elves and the thing that lets them go bonkers with mana.
Imagine having this in your opening hand and durdling for four turns instead of being able to Glimpse (or even Beck) on turn 2.