Hushbringer

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

Imposing Sovereign

Creatures your opponents control enter tapped.

During your turn, your opponents can't cast spells or activate abilities of artifacts, creatures, or enchantments.

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

Flash
Flying
Creatures entering don't cause abilities to trigger.

Creatures entering don't cause abilities to trigger.

Creatures with power 3 or greater don't untap during their controllers' untap steps.

Flying
Each player can't cast more than one spell each turn.
Nonbasic lands your opponents control enter tapped.

Flying
Noncreature spells cost {1} more to cast.

Nonartifact spells cost {1} more to cast.

Players can't search libraries. Any player may pay {2} for that player to ignore this effect until end of turn.

Flash
Flying
Artifacts and creatures entering don't cause abilities to trigger.

Each player can't draw more than one card each turn.

Nonwhite creatures with power 3 or greater don't untap during their controllers' untap steps.

First strike
Noncreature spells cost {1} more to cast.

First strike
Creatures and nonbasic lands your opponents control enter tapped.

Flash
If an opponent would draw two or more cards, instead you and that player each draw a card.

Flying
Whenever a permanent entering causes a triggered ability to trigger, counter that ability unless its controller pays {2}.

Legendary creatures don't untap during their controllers' untap steps.
When Arena of the Ancients enters, tap all legendary creatures.