Warren Elder

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

Treeguard Duo

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

Druid of the Spade

As long as you control a token, Druid of the Spade gets +2/+0 and has trample.

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.)

Head of the Homestead

When Head of the Homestead enters, create two 1/1 white Rabbit creature tokens.

Hinterland Sanctifier

Whenever another creature you control enters, you gain 1 life.

Brave-Kin Duo

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

Intrepid Rabbit

Offspring {1} (You may pay an additional {1} as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.)
When this creature enters, target creature you control gets +1/+1 until end of turn.

Carrot Cake

When Carrot Cake 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 Carrot Cake: You gain 3 life.