Valor

First strike
As long as Valor is in your graveyard and you control a Plains, creatures you control have first strike.

Commander Eesha

Embolden

Prevent the next 4 damage that would be dealt this turn to any number of targets, divided as you choose.
Flashback {1}{W} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Dedicated Martyr

{W}, Sacrifice Dedicated Martyr: You gain 3 life.

Battle Screech

Create two 1/1 white Bird creature tokens with flying.
Flashback—Tap three untapped white creatures you control. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Mystic Penitent

Vigilance
Threshold — As long as seven or more cards are in your graveyard, Mystic Penitent gets +1/+1 and has flying.

Tireless Tribe

Discard a card: Tireless Tribe gets +0/+4 until end of turn.

Militant Monk

Vigilance
{T}: Prevent the next 1 damage that would be dealt to any target this turn.

Selfless Exorcist

{T}: Exile target creature card from a graveyard. That card deals damage equal to its power to Selfless Exorcist.

Unquestioned Authority

Enchant creature
When Unquestioned Authority enters, draw a card.
Enchanted creature has protection from creatures.

Guided Strike

Target creature gets +1/+0 and gains first strike until end of turn.
Draw a card.

Beloved Chaplain

Suntail Hawk

Aven Cloudchaser

Flying (This creature can't be blocked except by creatures with flying or reach.)
When Aven Cloudchaser enters, destroy target enchantment.

Benevolent Bodyguard

Sacrifice Benevolent Bodyguard: Target creature you control gains protection from the color of your choice until end of turn.

Shelter

Target creature you control gains protection from the color of your choice until end of turn.
Draw a card.

Shieldmage Advocate

{T}: Return target card from an opponent's graveyard to their hand. Prevent all damage that would be dealt to any target this turn by a source of your choice.

Spurnmage Advocate

{T}: Return two target cards from an opponent's graveyard to their hand. Destroy target attacking creature.

Prismatic Strands

Prevent all damage that sources of the color of your choice would deal this turn.
Flashback—Tap an untapped white creature you control. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Plains

Patrol Hound

Discard a card: Patrol Hound gains first strike until end of turn.

Nomad Decoy

{W}, {T}: Tap target creature.
Threshold — {W}{W}, {T}: Tap two target creatures. Activate only if seven or more cards are in your graveyard.