Spelltithe Enforcer

Whenever an opponent casts a spell, that player sacrifices a permanent unless they pay {1}.

Loxodon Gatekeeper

Artifacts, creatures, and lands your opponents control enter tapped.

Artifact and enchantment spells your opponents cast cost {2} more to cast.
Sacrifice Aura of Silence: Destroy target artifact or enchantment.

At the beginning of your upkeep, you may choose a card type. If you do, each player sacrifices a permanent of that type.

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

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

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

All creatures have "At the beginning of your upkeep, sacrifice this creature unless you pay {1}."

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

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

Lands don't untap during their controllers' untap steps.
At the beginning of each player's upkeep, that player untaps a land they control.