As long as it's your turn, commanders you control have indestructible. (Effects that say "destroy" don't destroy them. A creature with indestructible can't be destroyed by damage.)

Partner (You can have two commanders if both have partner.)

Destroy target artifact. It can't be regenerated. Create X 1/1 green Saproling creature tokens, where X is that artifact's mana value.

At the beginning of your upkeep, put a spore counter on Elvish Farmer.

Remove three spore counters from Elvish Farmer: Create a 1/1 green Saproling creature token.

Sacrifice a Saproling: You gain 2 life.

{1}{G}, Exile a creature card from your graveyard: Create a 1/1 green Saproling creature token.

Sacrifice two Saprolings: You gain 2 life and draw a card.

Return target permanent card from your graveyard to your hand. If a creature died this turn, create two 1/1 green Saproling creature tokens.

{T}: Add {G}. When you spend this mana to cast a spell with mana value 6 or greater, draw a card.

Partner (You can have two commanders if both have partner.)

First strike, reach

At the beginning of combat on your turn, put X +1/+1 counters on another target creature you control, where X is Halana and Alena's power. That creature gains haste until end of turn.

{2}{G}: Create a 1/1 green Saproling creature token.

Jeska, Thrice Reborn enters the battlefield with a loyalty counter on her for each time you've cast a commander from the command zone this game.

0: Choose target creature. Until your next turn, if that creature would deal combat damage to one of your opponents, it deals triple that damage to that player instead.

-X: Jeska, Thrice Reborn deals X damage to each of up to three targets.

Jeska, Thrice Reborn can be your commander.

Partner

At the beginning of combat on your turn, creatures you control get +3/+3 and gain trample until end of turn.

{1}{G}: Until end of turn, target land you control becomes a 1/1 Elemental creature with vigilance, indestructible, and haste. It's still a land.

Partner (You can have two commanders if both have partner.)

Whenever a commander you control deals combat damage to an opponent, it deals that much damage to each other opponent.

Partner (You can have two commanders if both have partner.)

Devour 2 (As this enters the battlefield, you may sacrifice any number of creatures. This creature enters the battlefield with twice that many +1/+1 counters on it.)

At the beginning of your upkeep, create a 1/1 green Saproling creature token for each +1/+1 counter on Mycoloth.

{2}{G}: Create a 1/1 green Saproling creature token.

Sacrifice a Saproling: Saproling creatures get +1/+1 until end of turn.

{1}, Exile two creature cards from a single graveyard: Create a 1/1 green Saproling creature token.

Enrage -- Whenever Overgrown Armasaur is dealt damage, create a 1/1 green Saproling creature token.

At the beginning of your upkeep, put a spore counter on Psychotrope Thallid.

Remove three spore counters from Psychotrope Thallid: Create a 1/1 green Saproling creature token.

{1}, Sacrifice a Saproling: Draw a card.

+2: During target player's next turn, each creature that player controls attacks if able.

-2: Rowan Kenrith deals 3 damage to each tapped creature target player controls.

-8: Target player gets an emblem with "Whenever you activate an ability that isn't a mana ability, copy it. You may choose new targets for the copy."

Partner with Will Kenrith

Rowan Kenrith can be your commander.

You may cast Saproling Symbiosis as though it had flash if you pay {2} more to cast it. (You may cast it any time you could cast an instant.)

Create a 1/1 green Saproling creature token for each creature you control.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)

Create three 1/1 green Saproling creature tokens.

Each other creature you control that's a Fungus or Saproling gets +1/+1.

Landfall -- Whenever a land you control enters, create a 1/1 green Saproling creature token.

At the beginning of your upkeep, put a spore counter on each Fungus you control.

Remove three spore counters from Sporesower Thallid: Create a 1/1 green Saproling creature token.

At the beginning of your upkeep, you may put a fungus counter on target nontoken creature.

Whenever a creature with a fungus counter on it dies, create a 1/1 green Saproling creature token for each fungus counter on that creature.

When Sporogenesis leaves the battlefield, remove all fungus counters from all creatures.

At the beginning of your upkeep, put a spore counter on Sporoloth Ancient.

Creatures you control have "Remove two spore counters from this creature: Create a 1/1 green Saproling creature token."

Trample

Whenever Tana, the Bloodsower deals combat damage to a player, create that many 1/1 green Saproling creature tokens.

Partner (You can have two commanders if both have partner.)

At the beginning of your upkeep, put a spore counter on Thallid.

Remove three spore counters from Thallid: Create a 1/1 green Saproling creature token.

At the beginning of your upkeep, put a spore counter on Thallid Devourer.

Remove three spore counters from Thallid Devourer: Create a 1/1 green Saproling creature token.

Sacrifice a Saproling: Thallid Devourer gets +1/+2 until end of turn.

Read ahead (Choose a chapter and start with that many lore counters. Add one after your draw step. Skipped chapters don't trigger. Sacrifice after III.)

I -- Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

II -- Create a 1/1 green Saproling creature token.

III -- Domain -- Target creature you control gets +X/+X and gains trample until end of turn, where X is the number of basic land types among lands you control.

Put a +1/+1 counter on each creature you control.

Choose two --

• Exile target player's graveyard. You gain 1 life for each card exiled this way.

• Search your library for up to two land cards, put them onto the battlefield tapped, then shuffle.

• Create two 2/2 green Bear creature tokens.

• Put two +1/+1 counters on each creature you control.

Ulasht, the Hate Seed enters the battlefield with a +1/+1 counter on it for each other red creature you control and a +1/+1 counter on it for each other green creature you control.

{1}, Remove a +1/+1 counter from Ulasht: Choose one --

• Ulasht deals 1 damage to target creature.

• Create a 1/1 green Saproling creature token.

Whenever Undercellar Myconid enters the battlefield or dies, create a 1/1 green Saproling creature token.

{T}: Add one mana of any color.

At the beginning of your upkeep, put a spore counter on Utopia Mycon.

Remove three spore counters from Utopia Mycon: Create a 1/1 green Saproling creature token.

Sacrifice a Saproling: Add one mana of any color.

Enchant creature

Enchanted creature gets +3/+3 and has "At the beginning of each upkeep, create a 1/1 green Saproling creature token."

At the beginning of each upkeep, create a 1/1 green Saproling creature token.

Kicker {X} (You may pay an additional {X} as you cast this spell.)

Saproling creatures and other Treefolk creatures get +1/+1.

When Verdeloth the Ancient enters the battlefield, if it was kicked, create X 1/1 green Saproling creature tokens.