This came out of a build-around-a-random-card challenge a friend and I had. Scryfall coughed up a choice of five terrible cards and I picked Rejuvenate; I could have gone with a cycling deck but that's easy mode so this is where I ended up. I've found lifegain to be pretty good vs the Horde but never tried it in green before.
Kazandu Nectarpot, Essence Warden, Gift of the Woods, Azusa's Many Journeys
, Courser of Kruphix, Basilisk Collar and Rejuvenate gain us life, enabling the other effects.
The main win con is Ageless Entity. It can get big fast but it's expensive so you need to stay alive long enough for that to happen.
The tokens made by Trudge Garden can be handy blockers. It combos with Essence Warden, making as many 4/4 fungi as you can pay for. If you don't draw Ageless Entity early enough but have plenty of mana, this is another way to win the game.
Note that the Horde's creatures trigger Essence Warden as well, making it incredibly good in this context (I missed this detail at first).
Accomplished Alchemist is mostly a slightly overpriced blocker that can tap for 1 in a pinch or tap for a lot more if the stars align -- under ideal conditions, the extra mana it generates can be spent on a few more activations of Trudge Garden.
The Great Henge is completely unnecessary but the synergies are there and it's quite a good Magic card so I threw one in.
I've been experimenting with utility lands but as usual I've ended up with 25 basics because speed is of the essence early on and the abilities on the lands don't really matter that much.
