Auriok Champion

Protection from black and from red
Whenever another creature enters, you may gain 1 life.

Auramancer

When Auramancer enters, you may return target enchantment card from your graveyard to your hand.

Preston, the Vanisher

Whenever another nontoken creature you control enters, if it wasn't cast, create a token that's a copy of that creature, except it's a 0/1 white Illusion.
{1}{W}, Sacrifice five Illusions: Exile target nonland permanent.

Brightmare

When Brightmare enters, tap up to one target creature. You gain life equal to that creature's power.

Dawnbringer Cleric

When Dawnbringer Cleric enters, choose one —
• Cure Wounds — You gain 2 life.
• Dispel Magic — Destroy target enchantment.
• Gentle Repose — Exile target card from a graveyard.

Distinguished Conjurer

Whenever another creature you control enters, you gain 1 life.
{4}{W}, {T}: Exile another target creature you control, then return it to the battlefield under its owner's control.

Angel of Renewal

Flying
When Angel of Renewal enters, you gain 1 life for each creature you control.

Ancestor's Chosen

First strike (This creature deals combat damage before creatures without first strike.)
When Ancestor's Chosen enters, you gain 1 life for each card in your graveyard.

Angel of Mercy

Flying
When Angel of Mercy enters, you gain 3 life.

Celebrity Fencer

Alliance — Whenever another creature you control enters, put a +1/+1 counter on Celebrity Fencer.