Ajani's Welcome

Whenever a creature enters the battlefield under your control, you gain 1 life.

Angel of Vitality

Flying
If you would gain life, you gain that much life plus 1 instead.
Angel of Vitality gets +2/+2 as long as you have 25 or more life.

Flying
Whenever you gain life, put a +1/+1 counter on Bloodthirsty Aerialist.

Forsaken Sanctuary enters the battlefield tapped.
{T}: Add {W} or {B}.

Orzhov Guildgate enters the battlefield tapped.
{T}: Add {W} or {B}.

Enchant creature
When enchanted creature dies, return that card to the battlefield under your control with a +1/+1 counter on it.

Enchant creature
Enchanted creature can't attack or block.

Enchant creature
When Angelic Gift enters the battlefield, draw a card.
Enchanted creature has flying.