Tend the Sprigs

Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. Then if you control seven or more lands and/or Treefolk, create a 3/4 green Treefolk creature token with reach. (It can block creatures with flying.)

Forest

Goldmeadow Nomad

{W}, Exile this card from your graveyard: Create a 1/1 green and white Kithkin creature token. Activate only as a sorcery.

Vibrance

When this creature enters, if {R}{R} was spent to cast it, this creature deals 3 damage to any target.
When this creature enters, if {G}{G} was spent to cast it, search your library for a land card, reveal it, put it into your hand, then shuffle. You gain 2 life.
Evoke {R/G}{R/G}

Sygg, Wanderbrine Shield

Sygg can't be blocked.
Whenever this creature transforms into Sygg, Wanderbrine Shield, target creature you control gains protection from each color until your next turn.
At the beginning of your first main phase, you may pay {U}. If you do, transform Sygg.

Sygg, Wanderwine Wisdom

Sygg can't be blocked.
Whenever this creature enters or transforms into Sygg, Wanderwine Wisdom, target creature gains "Whenever this creature deals combat damage to a player or planeswalker, draw a card" until end of turn.
At the beginning of your first main phase, you may pay {W}. If you do, transform Sygg.

Sygg, Wanderwine Wisdom // Sygg, Wanderbrine Shield

Kinsbaile Aspirant

As an additional cost to cast this spell, behold a Kithkin or pay {2}. (To behold a Kithkin, choose a Kithkin you control or reveal a Kithkin card from your hand.)
Whenever another creature you control enters, this creature gets +1/+1 until end of turn.

Surly Farrier

{T}: Target creature you control gets +1/+1 and gains vigilance until end of turn. Activate only as a sorcery.

Prideful Feastling

Changeling (This card is every creature type.)
Lifelink

Kithkeeper

Vivid — When this creature enters, create X 1/1 green and white Kithkin creature tokens, where X is the number of colors among permanents you control.
Tap three untapped creatures you control: This creature gets +3/+0 and gains flying until end of turn.

Wary Farmer

At the beginning of your end step, if another creature entered the battlefield under your control this turn, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Wildvine Pummeler

Vivid — This spell costs {1} less to cast for each color among permanents you control.
Reach, trample

Plains

Wanderbrine Preacher

Whenever this creature becomes tapped, you gain 2 life.

Brigid, Doun's Mind

{T}: Add X {G} or X {W}, where X is the number of other creatures you control.
At the beginning of your first main phase, you may pay {W}. If you do, transform Brigid.

Brigid, Clachan's Heart

Whenever this creature enters or transforms into Brigid, Clachan's Heart, create a 1/1 green and white Kithkin creature token.
At the beginning of your first main phase, you may pay {G}. If you do, transform Brigid.

Brigid, Clachan's Heart // Brigid, Doun's Mind

Timid Shieldbearer

{4}{W}: Creatures you control get +1/+1 until end of turn.

Changeling Wayfinder

Changeling (This card is every creature type.)
When this creature enters, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle.

Spiral into Solitude

Enchant creature
Enchanted creature can't attack or block.
{1}{W}, Blight 1, Sacrifice this Aura: Exile enchanted creature. (To blight 1, put a -1/-1 counter on a creature you control.)

Brigid's Command

Choose two —
• Create a token that's a copy of target Kithkin you control.
• Target player creates a 1/1 green and white Kithkin creature token.
• Target creature you control gets +3/+3 until end of turn.
• Target creature you control fights target creature an opponent controls.

Noggle Robber

When this creature enters or dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Island

Temporal Cleansing

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.)
The owner of target nonland permanent puts it into their library second from the top or on the bottom.