Markov vampires cultivate an image of such decadent elegance that it can be easy to forget they can field a deadly fighting force.

Mounted Dreadknight

Trample
Mounted Dreadknight enters with a +1/+1 counter on it if an opponent lost life this turn.

Innistrad: Double Feature

Innistrad: Midnight Hunt

Mounted Dreadknight's last ability cares whether an opponent lost life this turn, not how their life total changed. For example, an opponent who gained 2 life and lost 1 life in the same turn still lost life.