I truly think the deck will be a go-wide build most of the time
You could build a reserve of high power, low toughness sacrifice fodder in order to draw plenty of cards without draining your life away too fast, but then Greven, Predator Captain wouldnt get a proper power bonus
However, after most of your Eternal Scourges are gone, you can use another Lost Legacy to get them all back
(They're enchantments with 2, Sacrifice this enchantment: Scry 1, then draw a card.) Two generic, Tap: Exile target nonlegendary creature you control
This gave the colorless identity a bit more of a
This is a series Ive been writing since Eldritch Moon , where Im predicting the amount of Standard play each card will have throughout its life in Standard, and not necessarily just for #SCGATL this weekend