Have

Coursers' Accord

Create a 3/3 green Centaur creature token, then populate. (Create a token that's a copy of a creature token you control.)

Gerrard's Command

Untap target creature. It gets +3/+3 until end of turn.

Abzan Banner

{T}: Add {W}, {B}, or {G}.
{W}{B}{G}, {T}, Sacrifice Abzan Banner: Draw a card.

Krosan Druid

Kicker {4}{G} (You may pay an additional {4}{G} as you cast this spell.)
When Krosan Druid enters, if it was kicked, you gain 10 life.

Selesnya Signet

Explosive Apparatus

{3}, {T}, Sacrifice Explosive Apparatus: It deals 2 damage to any target.

Forest

Selesnya Cluestone

{T}: Add {G} or {W}.
{G}{W}, {T}, Sacrifice Selesnya Cluestone: Draw a card.

Safewright Quest

Search your library for a Forest or Plains card, reveal it, put it into your hand, then shuffle.

Barkshell Blessing

Target creature gets +2/+2 until end of turn.
Conspire (As you cast this spell, you may tap two untapped creatures you control that share a color with it. When you do, copy it and you may choose a new target for the copy.)

Plains

Flickering Ward

Enchant creature
As Flickering Ward enters, choose a color.
Enchanted creature has protection from the chosen color. This effect doesn't remove Flickering Ward.
{W}: Return Flickering Ward to its owner's hand.

Steel Leaf Paladin

First strike
When Steel Leaf Paladin enters, return a green or white creature you control to its owner's hand.

Centaur Safeguard

({G/W} can be paid with either {G} or {W}.)
When Centaur Safeguard dies, you may gain 3 life.

Still Life

{G}{G}: Still Life becomes a 4/3 Centaur creature in addition to its other types until end of turn.

Phantom Centaur

Protection from black
Phantom Centaur enters with three +1/+1 counters on it.
If damage would be dealt to Phantom Centaur, prevent that damage. Remove a +1/+1 counter from Phantom Centaur.

Chronicler of Heroes

When Chronicler of Heroes enters, draw a card if you control a creature with a +1/+1 counter on it.

Common Bond

Put a +1/+1 counter on target creature.
Put a +1/+1 counter on target creature.

Armored Wolf-Rider

Heroes' Reunion

Centaur Healer

When Centaur Healer enters, you gain 3 life.

Dawnglow Infusion

You gain X life if {G} was spent to cast this spell and X life if {W} was spent to cast this spell. (Do both if {G}{W} was spent.)