Cards/Vampire

Pay 4 life: Adanto Vanguard gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Other legendary creatures you control get +2/+2.

Whenever Bishop of Binding attacks, target Vampire gets +X/+X until end of turn, where X is the power of the exiled card.

Whenever Bishop of Rebirth attacks, you may return target creature card with converted mana cost 3 or less from your graveyard to the battlefield.

When Blood Operative enters the battlefield, you may exile target card from a graveyard.
Whenever you surveil, if Blood Operative is in your graveyard, you may pay 3 life. If you do, return Blood Operative to your hand.

Bloodcrazed Paladin enters the battlefield with a +1/+1 counter on it for each creature that died this turn.

Whenever you gain life, put a +1/+1 counter on Bloodthirsty Aerialist.

Tap three untapped Vampires you control: Return Deathless Ancient from your graveyard to your hand.

, : Target attacking Vampire gets +1/+1 until end of turn.

Whenever another creature dies, put a +1/+1 counter on Elenda, the Dusk Rose.
When Elenda dies, create X 1/1 white Vampire creature tokens with lifelink, where X is Elenda's power.

Whenever Etrata deals combat damage to a player, exile target creature that player controls and put a hit counter on that card. That player loses the game if they own three or more exiled cards with hit counters on them. Etrata's owner shuffles Etrata into their library.

Whenever you gain life, untap Famished Paladin.

Whenever another Vampire enters the battlefield under your control, target creature gets +1/+1 until end of turn.

Pay 2 life: Glorifier of Dusk gains vigilance until end of turn.

Whenever a creature an opponent controls is dealt damage, put a +1/+1 counter on Kazarov, Sengir Pureblood.
: Kazarov deals 2 damage to target creature.

At the beginning of your end step, if a player lost 4 or more life this turn, put a +1/+1 counter on Knight of the Ebon Legion. (Damage causes loss of life.)

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

You may cast Oathsworn Vampire from your graveyard if you gained life this turn.

When Paladin of Atonement dies, you gain life equal to its toughness.

When Queen's Agent enters the battlefield, it explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)

At the beginning of each end step, if you gained life this turn, create a 1/1 black Bat creature token with flying.

Flying, lifelink

At the beginning of your end step, if an opponent lost life this turn, put a +1/+1 counter on Savage Gorger. (Damage causes loss of life.)

When Skymarch Bloodletter enters the battlefield, target opponent loses 1 life and you gain 1 life.

Skymarcher Aspirant has flying as long as you have the city's blessing.

Whenever The Haunt of Hightower attacks, defending player discards a card.
Whenever a card is put into an opponent's graveyard from anywhere, put a +1/+1 counter on The Haunt of Hightower.

Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.)
At the beginning of your upkeep, if you have the city's blessing, reveal the top card of your library and put it into your hand. Each opponent loses X life and you gain X life, where X is that card's converted mana cost.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

When Vampire Sovereign enters the battlefield, target opponent loses 3 life and you gain 3 life.

When Vengeant Vampire dies, destroy target creature an opponent controls and you gain 4 life.

, Pay 7 life: Destroy target nonland permanent. Activate this ability only during your turn.

When Voracious Vampire enters the battlefield, target Vampire you control gets +1/+1 and gains menace until end of turn.