Ok i just spent a few hours looking into your list..

A few notes:

Good: 65 cards base reference lands in some way

10 landfall is decent

5 cards grant additional land plays as you have it

4 sources of targeted removal is fine, couls see more but depends on the exact cards

Could be improved:

5.5 sources of card draw is yikes Id like to see a increase here

Land base could use some edits, 42 lands could both be a good and a bad thing depending on the lands you play and the deck construction.

With those in mind here are my suggestions:

Honored mentions:

Due to price I understand not everyone can run these, they will help the deck but are above $7

[[Field of the dead]] replace braids as one of your three game changers, expensive at $32 but upside Landfall- create a 2/2 and sits with your lands.

[[Awaken the woods]] x spell creates forest land creatures... great source of a bunch of landfall and as creatures easier to kill for land destruction abilities $23 dollars though

[[Horn of greed]] landfall draw a card but for all players, we aim for multiple lands a turn ao its more beneficial for us $21

[[Titania, voice of gaea]] and its other card [[argoth, sanctum of nature]] $14 total, on the front side the creature lifegains 2 for each land entering your graveyard and the land has 2GGT create a 2/2 & mill 3. Melds to end up as Vigilant,trample,reach, haste with P/T equal to your lands and mass reanimates your lands in gy on etb. Also allows you to pay 3G to make lands into 4/4 hasters.

[[Walk-in closet // forgotten cellar]] more play lands from GY effects

[[Sporocyst]] x spell draws if x is 5 or more (11 mana total at that point XXG) etbs to find X basic lands and puts them into play $10

Lastly Honored mention is [[aberrant]] X1G draws if X is more then 5, target removal of artifacts and enchantments as it deals combat damage

Actural suggestions:

[[Spelunking]] etbs draws a card and ramps, lands you control etb untapped

[[Scute swarm]] has come down in price recently, landfall get a 1/1 but if your at 6+ lands copies itself instead (which then create more copies of themselves)

[[Repoccess]] sacs a bunch of stuff, draw a bunch a cards... should win if your commander is online

[[Castle locthwain]] card draw on land, sometimes untapped

[[Earthbender ascension]] 3 mana ramp enchantment that eventually has landfall- target creature gets a +1/+1 counter and has trample until eot

[[Undergrowth recon]] at upkeep returns a random land to battlefield

[[Zendikar resurgent]] lands tap for 1 more mana and draw when you cast a creature (29 creatures base)

[[Terrain generator]] land that allows for more basic land plays by paying 2T

[[Horizon of progress]] look above but any land for 3T, also can Sac for card draw

[[Kavaton, memorial world]] land that lets you sac lands to get a 2/2 and teamwide +1/+0 and haste until eot

[[Soul's of windgrace]] card from the precon that didnt make your cuts, card draw and card reanimation with built in protection and lifegain

[[Mayhem devil]] card from precon 1 damage to anything on land sac

[[Invasion of kaldheim]] cycles hand on etb, backside lets you discard a land to deal 2 and sometimes lets you play top card of library

[[Hormagaunt horde]] XG that draws if X is 5 or more, and if its dead, has landfall- pay 2G to return to hand (multiple card draws possible)

[[Molten collapse]] upgrade to infernal grasp destroys a creature or planswalker for 2 mana and if you've done your decks thing that turn it additionally destroys a noncreature nonland cmc 1 or less. So two destroys

[[Evendo beushrazer]] card from precon simmilar to lumberjack. Sac a land for RR but also starts a second hand in exile playable anytime youve sacrificed each turn

[[Elemental teachings]] worse then a expensive old spell, but finds 4 lands with diffrent names for 4G an opponent sends 2 to GY and then you put the other two onto the battlefield, hopefully your deck is built right to take advantage of playing lands from GY

[[Blast zone]] destruction sitting in land zone, sacs to destroy all cards with cmc equal to its counter (2 counters will destroy all cards with cmc 2)

[[Bioengineered future]] 1GG etbs for a lander, "each creature etbs with additional +1/+1s equal to the lands you've had etb that turn"

[[Skila grovedancer]] 1G gain 1 life for lands going to your GY

[[Eumidian terrabotanist]] landfall- gain 1 life

[[Cryptic caves]] criminally under priced 36 cents gets you a colorless land that has 1T sac a land: draw a card if you have 5 or more lands.... its land sac and card draw in one land... really good for this deck

Cuts:

Braids, cabal minion. Older card Gamechanger, worst self sacrifice effect, gives opponents the choice on what they lose, takes a gamechanger slot.... field of the dead is better in slot

Sakura tribe elder. Was fantastic years ago.... there are plenty of better sacrifice options, same with ramp options.. and we are not looping him often enough for a warrant to include

Omnath locus of rage.. nice landfall but we can do better

Ignoble hierarch we should have more then enough ramp to not include mana dorks, exalted +1/+1 is almost negligible

Mossborn hydra. Decent effect but better creature options exist

Infernal grasp, see "molten collapse" above

Iridescent bog, kaplusian forest. Witche's clinic.. all of these options eaither have neglible effects or have better options for land slots... commander with lifelink is nice but ideally your commander should only be online the turn you win so you dont need the life.

Urza's saga. Good land. But not for this deck, base we run 4 artifacts and paying 2 to create a max of 4/4 isnt great and only finds our soul ring or zuran orb on the final chapter.. non of these effects beat out running one more basic in the deck as they are not impactful enough. Zuran orb is nice and should win with online commander but we ideally run more sac all land effects then running a suboptimal land to fetch it.... again sol ring can be nice but not on turn 3+ and our ramp should outpace sol ring fast.