Actually Akhoum Firebird might be a good wincon too. Evasion, persistent. Problem is we have only 4 fetches to make his ability instant speed.
Sower is fine too though.
Please give feedback after testing, i'm not sure how this deck performs
GAME 1: A veerrrrrry slow R/G ramp deck that used 3
Nissa's Pilgrimage in a row, but lacking any blue sources I couldn't do much to the onslaught of Eldrazi and Gaea's that hit. Willing to put this down to a fluke, but could be a potential weak deck to face, as Green now has a double recursion creature (on entering the battlefield AND on death...Green needed more value /sarcasm).
GAME 2: Similar thing, but the
Benthic Infiltrator, I LOVE THIS GUY! Early enablers for exile mechanics that have evasion are gonna be the way to go I think, since
Ulamog's Nullifier will need these guys doing work early in order to have relevance. Ob Nixilis was the wincon here on hitting -8 and just blocking the rest of my opponent's big stuff until winning. Another interesting feature,
Brutal Explosion deals with Gaea's as a counter and frankly won me that game.
I'll admit it, game 2 got me pumped on the potential synergy your deck can pull off, but I think some more of these early ingest creatures may be needed. Isn't there a 2 mana flying blue one?
EDIT: Sower might just be swapped for a 2nd Benthic Infiltrator, on game 3 and really impressed with it.