Ajani, Strength of the Pride

Color Identity:W

Market Price: $12.85

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/192523_200w.jpg

+1: You gain life equal to the number of creatures you control plus the number of planeswalkers you control.
−2: Create a 2/2 white Cat Soldier creature token named Ajani's Pridemate with "Whenever you gain life, put a +1/+1 counter on Ajani's Pridemate."
0: If you have at least 15 life more than your starting life total, exile Ajani, Strength of the Pride and each artifact and creature your opponents control.

Buy This Card! https://shop.tcgplayer.com/magic/core-set-2020/ajani-strength-of-the-pride

Basri's Lieutenant

Color Identity:W

Market Price: $0.35

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/215503_200w.jpg

Vigilance, protection from multicolored
When Basri's Lieutenant enters the battlefield, put a +1/+1 counter on target creature you control.
Whenever Basri's Lieutenant or another creature you control dies, if it had a +1/+1 counter on it, create a 2/2 white Knight creature token with vigilance.

Buy This Card! https://shop.tcgplayer.com/magic/core-set-2021/basris-lieutenant

Linden, the Steadfast Queen

Color Identity:W

Market Price: $0.42

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/199209_200w.jpg

Vigilance
Whenever a white creature you control attacks, you gain 1 life.

Buy This Card! https://shop.tcgplayer.com/magic/throne-of-eldraine/linden-the-steadfast-queen

Mangara, the Diplomat

Color Identity:W

Market Price: $10.53

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/215326_200w.jpg

Lifelink
Whenever an opponent attacks with creatures, if two or more of those creatures are attacking you and/or planeswalkers you control, draw a card.
Whenever an opponent casts their second spell each turn, draw a card.

Buy This Card! https://shop.tcgplayer.com/magic/core-set-2021/mangara-the-diplomat

Glorious Anthem

Color Identity:W

Market Price: $0.35

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/215674_200w.jpg

Creatures you control get +1/+1.

Buy This Card! https://shop.tcgplayer.com/magic/core-set-2021/glorious-anthem

Heliod, Sun-Crowned

Color Identity:W

Market Price: $25.98

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/206666_200w.jpg

Indestructible
As long as your devotion to white is less than five, Heliod isn't a creature.
Whenever you gain life, put a +1/+1 counter on target creature or enchantment you control.
{1}{W}: Another target creature gains lifelink until end of turn.

Buy This Card! https://shop.tcgplayer.com/magic/theros-beyond-death/heliod-sun-crowned

Castle Ardenvale

Color Identity:W

Market Price: $2.29

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/199390_200w.jpg

Castle Ardenvale enters the battlefield tapped unless you control a Plains.
{T}: Add {W}.
{2}{W}{W}, {T}: Create a 1/1 white Human creature token.

Buy This Card! https://shop.tcgplayer.com/magic/throne-of-eldraine/castle-ardenvale

Alseid of Life's Bounty

Color Identity:W

Market Price: $0.56

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/206945_200w.jpg

Lifelink
{1}, Sacrifice Alseid of Life's Bounty: Target creature or enchantment you control gains protection from the color of your choice until end of turn.

Buy This Card! https://shop.tcgplayer.com/magic/theros-beyond-death/alseid-of-lifes-bounty

Adherent of Hope

Color Identity:W

Market Price: $0.16

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/215410_200w.jpg

At the beginning of combat on your turn, if you control a Basri planeswalker, put a +1/+1 counter on Adherent of Hope.

Buy This Card! https://shop.tcgplayer.com/magic/core-set-2021/adherent-of-hope

Ajani's Pridemate

Color Identity:W

Market Price: $0.22

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/187127_200w.jpg

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

Buy This Card! https://shop.tcgplayer.com/magic/war-of-the-spark/ajanis-pridemate

Unbreakable Formation

Color Identity:W

Market Price: $0.77

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/227278_200w.jpg

Creatures you control gain indestructible until end of turn.
Addendum — If you cast this spell during your main phase, put a +1/+1 counter on each of those creatures and they gain vigilance until end of turn.

Buy This Card! https://shop.tcgplayer.com/magic/commander-legends/unbreakable-formation

Plains

Color Identity:W

Market Price: $0.69

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/235540_200w.jpg

({T}: Add {W}.)

Buy This Card! https://shop.tcgplayer.com/magic/strixhaven-school-of-mages/plains-366

Venerated Loxodon

Color Identity:W

Market Price: $0.31

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/176679_200w.jpg

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 Venerated Loxodon enters the battlefield, put a +1/+1 counter on each creature that convoked it.

Buy This Card! https://shop.tcgplayer.com/magic/guilds-of-ravnica/venerated-loxodon

Basri Ket

Color Identity:W

Market Price: $2.08

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/215501_200w.jpg

+1: Put a +1/+1 counter on up to one target creature. It gains indestructible until end of turn.
−2: Whenever one or more nontoken creatures attack this turn, create that many 1/1 white Soldier creature tokens that are tapped and attacking.
−6: You get an emblem with "At the beginning of combat on your turn, create a 1/1 white Soldier creature token, then put a +1/+1 counter on each creature you control."

Buy This Card! https://shop.tcgplayer.com/magic/core-set-2021/basri-ket

Speaker of the Heavens

Color Identity:W

Market Price: $3.31

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/215680_200w.jpg

Vigilance, lifelink
{T}: Create a 4/4 white Angel creature token with flying. Activate this ability only if you have at least 7 life more than your starting life total and only any time you could cast a sorcery.

Buy This Card! https://shop.tcgplayer.com/magic/core-set-2021/speaker-of-the-heavens