msem-instigator

Enchant creature
Enchanted creature gets +3/-2.

Target player discards a card. If that player discards a land card this way, they lose 3 life.

Exile target creature and all other creatures with the same name as that creature. Search its controller's graveyard, hand and library for any number of cards with the same name as that creature and exile them. Then that player shuffles. Exile Erase from Existence.

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

As an additional cost to cast this spell, discard a card.
Search your library for a card with mana value X or less, where X is 1 plus the discarded card's mana value, reveal it, put it into your hand, then shuffle.

As an additional cost to cast this spell, sacrifice a creature.
Target creature gains +4/+4 until end of turn.

Flying (This creature can't be blocked except by creatures with flying or reach.)
When Lord of Swarms enters or dies, target creature gets -2/-2 until end of turn.

Menace (This creature can't be blocked except by two or more creatures.)
Whenever Mausoleum Revenant deals damage to a player, create a 2/2 black Zombie creature token.

Target player reveals their hand. You choose three cards from it and exile them. Then that player exiles the top three cards of their library.

Target creature you control gets +1/+0 and gains menace until end of turn. (That creature can only be blocked by two or more creatures.)
Draw a card.

Return up to two target creature cards from your graveyard to your hand.

Destroy target creature an opponent controls, then that player sacrifices a creature.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)
When Ophelia's Neophyte enters, you may have another target creature you control gain lifelink until end of turn.

Flying
When Palloren Vulture enters, each player mills two cards.

{2}, {T}, Sacrifice a creature: Each opponent loses 2 life. You gain life equal to the life lost this way.

{B}: Revenant Shade gets +1/+1 until end of turn.

Put target creature card from a graveyard onto the battlefield under your control. That creature is a black Zombie in addition to its other colors and types.

Destroy target land. Create a 2/2 black Zombie creature token.

Menace (This creature can't be blocked except by two or more creatures.)
Whenever Sagi's Revenant deals combat damage to a player, that player discards a card.
Whenever an opponent discards a land card, you may have target creature get -2/-2 until end of turn.

Target creature gets -2/-2 until end of turn. Scry 1.

Flying, trample
Whenever an opponent casts a noncreature spell, that player loses 5 life unless they sacrifice a creature or discard a card.

Enchant land
Enchanted land loses all land types, has “{T}: Add {C}”, and loses all other abilities.

When Twice-Lived Dead dies, create a 2/2 black Zombie creature token.

If you would lose life, exile that many cards from the top of your library instead.
If you would gain life, draw that many cards instead.
When Unhallowed Concordat leaves the battlefield, you lose life equal to the number of cards you own in exile.

Target creature gains lifelink until end of turn. (Damage dealt by that creature also causes you to gain that much life.)