Soul's Attendant

Whenever another creature enters the battlefield, you may gain 1 life.

Aven Mindcensor

Flash
Flying
If an opponent would search a library, that player searches the top four cards of that library instead.

Flying, lifelink
Creatures entering the battlefield or dying don't cause abilities to trigger.

Counter target spell. If that spell is countered this way, put it on top of its owner's library instead of into that player's graveyard.

Whenever you gain life, you may put that many +1/+1 counters on each creature you control. Do this only once each turn.

Exile target creature. Its controller gains life equal to its power.

Your opponents can't cast spells from anywhere other than their hands.

{T}: Target creature you control gains protection from the color of your choice until end of turn.

As Sanctum Prelate enters the battlefield, choose a number.
Noncreature spells with mana value equal to the chosen number can't be cast.

Whenever you cast a creature spell, draw a card.

Flying
You, planeswalkers you control, and other creatures you control have hexproof.
{4}{G}{G}: Put a +1/+1 counter on each creature you control.