Bristlebane Outrider

This creature can't be blocked by creatures with power 2 or less.
As long as another creature entered the battlefield under your control this turn, this creature gets +2/+0.

Eclipsed Kithkin

When this creature enters, look at the top four cards of your library. You may reveal a Kithkin, Forest, or Plains card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Mistmeadow Council

This spell costs {1} less to cast if you control a Kithkin.
When this creature enters, draw a card.

Blossoming Defense

Target creature you control gets +2/+2 and gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)

Thoughtweft Lieutenant

Whenever this creature or another Kithkin you control enters, target creature you control gets +1/+1 and gains trample until end of turn.

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

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.)

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.

Plains

Keep Out

Choose one —
• Keep Out deals 4 damage to target tapped creature.
• Destroy target enchantment.

Goldmeadow Nomad

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

Forest

Appeal to Eirdu

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.)
One or two target creatures each get +2/+1 until end of turn.

Flock Impostor

Changeling (This card is every creature type.)
Flash
Flying
When this creature enters, return up to one other target creature you control to its owner's hand.

Clachan Festival

When this enchantment enters, create two 1/1 green and white Kithkin creature tokens.
{4}{W}: Create a 1/1 green and white Kithkin creature token.

Timid Shieldbearer

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

Crossroads Watcher

Trample
Whenever another creature you control enters, this creature gets +1/+0 until end of turn.

Dundoolin Weaver

When this creature enters, if you control three or more creatures, return target permanent card from your graveyard to your hand.

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.)