Scare Tactics

Creatures you control get +1/+0 until end of turn.

Darkness

Prevent all combat damage that would be dealt this turn.

Guul Draz Vampire

As long as an opponent has 10 or less life, this creature gets +2/+1 and has intimidate. (It can't be blocked except by artifact creatures and/or creatures that share a color with it.)

Vendetta

Destroy target nonblack creature. It can't be regenerated. You lose life equal to that creature's toughness.

Clawing Torment

Enchant artifact or creature
As long as enchanted permanent is a creature, it gets -1/-1 and can't block.
Enchanted permanent has "At the beginning of your upkeep, you lose 1 life."

Pulse Tracker

Whenever this creature attacks, each opponent loses 1 life.

Swamp

Gift of Fangs

Enchant creature
Enchanted creature gets +2/+2 as long as it's a Vampire. Otherwise, it gets -2/-2.

Vampire's Bite

Kicker {2}{B} (You may pay an additional {2}{B} as you cast this spell.)
Target creature gets +3/+0 until end of turn. If this spell was kicked, that creature gains lifelink until end of turn. (Damage dealt by the creature also causes its controller to gain that much life.)

Dash Hopes

When you cast this spell, any player may pay 5 life. If a player does, counter Dash Hopes.
Counter target spell.

Geth's Verdict

Target player sacrifices a creature of their choice and loses 1 life.

Forever Young

Put any number of target creature cards from your graveyard on top of your library.
Draw a card.

Carnophage

At the beginning of your upkeep, tap this creature unless you pay 1 life.

Defile

Target creature gets -1/-1 until end of turn for each Swamp you control.

Dark Ritual

Vampire Lacerator

At the beginning of your upkeep, you lose 1 life unless an opponent has 10 or less life.

Unearth

Return target creature card with mana value 3 or less from your graveyard to the battlefield.
Cycling {2} ({2}, Discard this card: Draw a card.)

Changeling Outcast

Changeling (This card is every creature type.)
This creature can't block and can't be blocked.