Valley Questcaller

Whenever one or more other Rabbits, Bats, Birds, and/or Mice you control enter, scry 1.
Other Rabbits, Bats, Birds, and Mice you control get +1/+1.

Plains

Have

Hop to It

Create three 1/1 white Rabbit creature tokens.

Banishing Light

When this enchantment enters, exile target nonland permanent an opponent controls until this enchantment leaves the battlefield.

Warren Elder

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

Rabbit Response

Creatures you control get +2/+1 until end of turn. If you control a Rabbit, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Treeguard Duo

When this creature enters, until end of turn, target creature you control gains vigilance and gets +X/+X, where X is the number of creatures you control.

Carrot Cake

When this artifact enters and when you sacrifice it, create a 1/1 white Rabbit creature token and scry 1. (Look at the top card of your library. You may put that card on the bottom.)
{2}, {T}, Sacrifice this artifact: You gain 3 life.

Brave-Kin Duo

{1}, {T}: Target creature gets +1/+1 until end of turn. Activate only as a sorcery.

Finneas, Ace Archer

Vigilance, reach
Whenever Finneas attacks, put a +1/+1 counter on each other creature you control that's a token or a Rabbit. Then if creatures you control have total power 10 or greater, draw a card.

Head of the Homestead

When this creature enters, create two 1/1 white Rabbit creature tokens.

Harvestrite Host

Whenever this creature or another Rabbit you control enters, target creature you control gets +1/+0 until end of turn. Then draw a card if this is the second time this ability has resolved this turn.

Forest

Burrowguard Mentor

Trample
Burrowguard Mentor's power and toughness are each equal to the number of creatures you control.