White knights to the rescue

Put two +1/+1 counters on target creature.

Look at the top five cards of your library. You may reveal a white card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Whenever you gain life, put a +1/+1 counter on Ajani's Pridemate.

[+2]: You gain 1 life for each creature you control.

[−3]: Creatures you control get +2/+2 until end of turn.

[−9]: Put X +1/+1 counters on target creature, where X is your life total.

When Cavalry Drillmaster enters the battlefield, target creature gets +2/+0 and gains first strike until end of turn. (It deals combat damage before creatures without first strike.)

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.)

When Conclave Tribunal enters the battlefield, exile target nonland permanent an opponent controls until Conclave Tribunal leaves the battlefield.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Court Cleric gets +1/+1 as long as you control an Ajani planeswalker.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

When Dwarven Priest enters the battlefield, you gain 1 life for each creature you control.

At the beginning of your upkeep, you gain 1 life.

{3}, Sacrifice Fountain of Renewal: Draw a card.

Vigilance (Attacking doesn't cause this creature to tap.)

When Gallant Cavalry enters the battlefield, create a 2/2 white Knight creature token with vigilance.

Flying

Whenever Herald of Faith attacks, you gain 2 life.

Vigilance (Attacking doesn't cause this creature to tap.)

Enchant creature

Enchanted creature gets +2/+2.

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.)

Enchant creature

Enchanted creature can't attack or block.

Whenever another creature with power 2 or less enters the battlefield under your control, you may pay {1}. If you do, draw a card.

Vigilance (Attacking doesn't cause this creature to tap.)

When Militia Bugler enters the battlefield, look at the top four cards of your library. You may reveal a creature card with power 2 or less from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Flying

Whenever Pegasus Courser attacks, another target attacking creature gains flying until end of turn.

You gain 3 life.

Draw a card.

Righteous Blow deals 2 damage to target attacking or blocking creature.

Flying

Flying (This creature can't be blocked except by creatures with flying or reach.)

Vigilance (Attacking doesn't cause this creature to tap.)

Other creatures you control have vigilance.

Shield Mare can't be blocked by red creatures.

When Shield Mare enters the battlefield or becomes the target of a spell or ability an opponent controls, you gain 3 life.

Flying (This creature can't be blocked except by creatures with flying or reach.)

Target creature gets +2/+2 until end of turn. You gain 1 life for each attacking creature you control.

When Trusty Packbeast enters the battlefield, return target artifact card from your graveyard to your hand.

Other Knights you control get +1/+1.

{3}{W}{W}: Knights you control gain double strike until end of turn.