Surrender Your Thoughts

When you set this scheme in motion, target opponent chooses self or others. If that player chooses self, that player discards four cards. If the player chooses others, each of your other opponents discards two cards.

My Undead Horde Awakens

(An ongoing scheme remains face up until it's abandoned.)
At the beginning of your end step, you may put target creature card from an opponent's graveyard onto the battlefield under your control.
When a creature put onto the battlefield with this scheme dies, abandon this scheme.

I Delight in Your Convulsions

When you set this scheme in motion, each opponent loses 3 life. You gain life equal to the life lost this way.

My Genius Knows No Bounds

When you set this scheme in motion, you may pay {X}. If you do, you gain X life and draw X cards.

When Will You Learn?

When you set this scheme in motion, each opponent exiles the top card of their library. You may cast any number of spells from among cards exiled this way without paying their mana costs.

This World Belongs to Me

When you set this scheme in motion, draw two cards. You may play an additional land this turn.

Rotted Ones, Lay Siege

When you set this scheme in motion, for each opponent, create a 2/2 black Zombie creature token that attacks that player each combat if able.

Make Yourself Useful

When you set this scheme in motion, destroy target creature an opponent controls. If a creature is destroyed this way, you gain life equal to its toughness.

My Forces Are Innumerable

(An ongoing scheme remains face up until it's abandoned.)
At the beginning of your end step, create a 3/3 black Horror creature token.
At the beginning of your opponents' end step, they may sacrifice two creatures. If they do, abandon this scheme.

Only Blood Ends Your Nightmares

When you set this scheme in motion, each opponent sacrifices a creature. Then each opponent who didn't sacrifice a creature discards two cards.

Realms Befitting My Majesty

When you set this scheme in motion, search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

No One Will Hear Your Cries

When you set this scheme in motion, each opponent chooses a creature they control, then sacrifices the rest.

The Dead Shall Serve

When you set this scheme in motion, for each opponent, put up to one target creature card from that player's graveyard onto the battlefield under your control. Each of those creatures attacks its owner each combat if able.

Tooth, Claw, and Tail

When you set this scheme in motion, destroy up to three target nonland permanents.

Mortal Flesh Is Weak

When you set this scheme in motion, each opponent's life total becomes the lowest life total among your opponents.