Ha! Love the role-play that you're doing with the deck! I also like it that you've got a strategy an are going for the synergy to get there. However, the deck is quite un-balanced, and since you asked for advice i'll tell you that i honestly think it needs a lot of work. Start with reading the
General Deck Advice sticky, your deck makes a lot of those mistakes. Here are some of my specific thoughs, in no paticular order;
You mana curve is not good. You have too many 4-drops, and not enough stuff to do early game.
Llanowar elves instead of
Elvish Pioneer might help with ramp, Gatekreeper Vines is Ok but not great, but ramp won't get you there alone anyway.
You can't be running only 22 lands when you're trying to get to a bunch of 4s and 5s. Even with ramp and/or a decent curve, you should have 24, or you'll just be missing too often in your opening hand.
Get this down to 61 cards. Every extra card is just one more draw until you get to your best stuff.
Your synergy play is not strong enough, and too clugy to get it to go off. Tapping a
Liquimetal Coating so you can self-target
Natural End so you can get a +1/+1 on
Lumberknot is too many steps in general, and you still only get +1/+1. And that also requires you to have drawn one of you're only 2 copies of
Lumberknot in the first place. For
lumberknot to really go off, you need sac outlets. Add black and
Viscera Seer, put in the implements that can at least sac themselves. Use
ichor Wellspring that will at least give you a card when it goes. Better yet, add some low curve creatures that can sac themselves for value and avoid having to setup a clugy chain. If
Lumberknot is going to be your win-con in this deck you need to find easier ways to get it to go off, and to get around chump-blocks (and you'll need 4)
At 2 mana,
Naturalize is better than
Natural End, and
Oxidize is even better.
Elvish Scrapper has a place in this deck, it does both of what you want at the same time.
You have some sort of lifegain thing going on here, but it's not well-formed. Lifegain is not good like that. You either need go all in with things like
Soul Warden and having _everything_ do it, so you gain so much you can't lose, or have cards like
Ajani's Pridemate that can gain huge extra value from it. Ideally both, but then it's a lifegain deck, not the Herbal
Remedy Kit, so you should probably just cut it. A little life gain here or there won't swing the game in your favor, so it's really not worth the extra mana: replace those cards with cheaper versions that don't have the gain.
There are some more thoughts in the back of my head, but these are the big ones.
I'll try to take another look once you make some of these updates, and don't
forget to read through the General Deck Advice sticky and see what improvements you could make based on those.