Post-rotation Elf tribal deck. I've been looking at this for a little bit and, while GRN didn't have as much Elf tribal as I'd hoped, I think there's enough there to support what we've already got from M19 and DOM. White is the supporting color primarily for Shalai and her mana sink, but the O-rings and Assemble are also useful.

I'm not too sure on the SB. Ghalta's there if I need to go over the top, and Ajani gives me a little bit of repeatable recursion and extra counters. The rest are generic situational cards. Advice here would be especially useful.