Each of Malakir's great families boasts a contingent of nulls appropriate to its rank in society.

Kalastria Highborn

Whenever this creature or another Vampire you control dies, you may pay {B}. If you do, target player loses 2 life and you gain 2 life.

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Whenever Kalastria Highborn or another Vampire you control is put into a graveyard from the battlefield, you may pay {B}. If you do, target player loses 2 life and you gain 2 life.

If multiple Vampires you control (possibly including Kalastria Highborn itself) are put into their owners' graveyards at the same time, Kalastria Highborn's ability triggers that many times.

If the targeted player is an illegal target by the time the ability resolves (for example, if that player has left a multiplayer game), the entire ability doesn't resolve. You can't pay {B} and you don't gain life.

You target a player when the ability triggers. You choose whether to pay {B} as the ability resolves. You may pay {B} only once per resolution.