Basic landcycling {1} ({1}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)
{2}{G}
Erinis, Gloom Stalker
Legendary Creature - Halfling Ranger
Deathtouch
Whenever Erinis, Gloom Stalker attacks, return target land card from your graveyard to the battlefield.
Choose a Background (You can have a Background as a second commander.)
3 /
3
--
Evolving Wilds
Land
{T}, Sacrifice Evolving Wilds: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
{2}{G}{G}
Harmonize
Sorcery
Draw three cards.
{1}{G}{G}
Kazandu Mammoth
Creature - Elephant
Landfall -- Whenever a land enters the battlefield under your control, Kazandu Mammoth gets +2/+2 until end of turn.
3 /
3
--
Kazandu Valley
Land
Kazandu Valley enters the battlefield tapped.
{T}: Add {G}.
3 /
3
--
Myriad Landscape
Land
Myriad Landscape enters the battlefield tapped.
{T}: Add {C}.
{2}, {T}, Sacrifice Myriad Landscape: Search your library for up to two basic land cards that share a land type, put them onto the battlefield tapped, then shuffle.
{B}
Raise Dead
Sorcery
Return target creature card from your graveyard to your hand.
{4}{G}{G}
Rampaging Baloths
Creature - Beast
Trample
Landfall -- Whenever a land enters the battlefield under your control, you may create a 4/4 green Beast creature token.
6 /
6
--
Riveteers Overlook
Land
When Riveteers Overlook enters the battlefield, sacrifice it. When you do, search your library for a basic Swamp, Mountain, or Forest card, put it onto the battlefield tapped, then shuffle and you gain 1 life.
{1}{B}
Scion of Halaster
Legendary Enchantment - Background
Commander creatures you own have "The first time you would draw a card each turn, instead look at the top two cards of your library. Put one of them into your graveyard and the other back on top of your library. Then draw a card."
{2}{G}
Scute Swarm
Creature - Insect
Landfall -- Whenever a land enters the battlefield under your control, create a 1/1 green Insect creature token. If you control six or more lands, create a token that's a copy of Scute Swarm instead.
1 /
1
{X}{B}
Skeletal Scrying
Instant
As an additional cost to cast this spell, exile X cards from your graveyard.
You draw X cards and you lose X life.
--
Terramorphic Expanse
Land
{T}, Sacrifice Terramorphic Expanse: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
{3}{B}
Zombify
Sorcery
Return target creature card from your graveyard to the battlefield.