Unnatural Hunger

Enchant creature
At the beginning of the upkeep of enchanted creature's controller, this Aura deals damage equal to that creature's power to that player unless they sacrifice another creature of their choice.

Seal of Removal

Sacrifice this enchantment: Return target creature to its owner's hand.

Getting

Seal of Doom

Sacrifice this enchantment: Destroy target nonblack creature. It can't be regenerated.

Kirtar's Desire

Enchant creature
Enchanted creature can't attack.
Threshold — Enchanted creature can't block as long as there are seven or more cards in your graveyard.

Phyrexian Arena

At the beginning of your upkeep, you draw a card and you lose 1 life.

Hypnox

Flying
When this creature enters, if you cast it from your hand, exile all cards from target opponent's hand.
When this creature leaves the battlefield, return the exiled cards to their owner's hand.

Seal of Cleansing

Sacrifice this enchantment: Destroy target artifact or enchantment.

Hanna, Ship's Navigator

{1}{W}{U}, {T}: Return target artifact or enchantment card from your graveyard to your hand.

Arrest

Enchant creature
Enchanted creature can't attack or block, and its activated abilities can't be activated.

Apprentice Wizard

Planar Collapse

At the beginning of your upkeep, if there are four or more creatures on the battlefield, sacrifice this enchantment and destroy all creatures. They can't be regenerated.

Vesuvan Doppelganger

You may have this creature enter as a copy of any creature on the battlefield, except it doesn't copy that creature's color and it has "At the beginning of your upkeep, you may have this creature become a copy of target creature, except it doesn't copy that creature's color and it has this ability."

Subversion

At the beginning of your upkeep, each opponent loses 1 life. You gain life equal to the life lost this way.

Pacifism

Enchant creature
Enchanted creature can't attack or block.

Monk Idealist

When this creature enters, return target enchantment card from your graveyard to your hand.

Paralyze

Enchant creature
When this Aura enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
At the beginning of the upkeep of enchanted creature's controller, that player may pay {4}. If the player does, untap the creature.

Chromium

Flying
Rampage 2 (Whenever this creature becomes blocked, it gets +2/+2 until end of turn for each creature blocking it beyond the first.)
At the beginning of your upkeep, sacrifice Chromium unless you pay {W}{U}{B}.

Auramancer

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

Aura Thief

Flying
When this creature dies, you gain control of all enchantments. (You don't get to move Auras.)

Oubliette

When this enchantment enters, target creature phases out until this enchantment leaves the battlefield. Tap that creature as it phases in this way. (Auras and Equipment phase out with it. While permanents are phased out, they're treated as though they don't exist.)

Stormscape Familiar

Flying
White spells and black spells you cast cost {1} less to cast.

Underworld Dreams

Whenever an opponent draws a card, this enchantment deals 1 damage to that player.

Tragic Poet

{T}, Sacrifice this creature: Return target enchantment card from your graveyard to your hand.