Markov Household

Vampires you control get Absorb 1
During each endstep, put X Blood Counters on
Markov Household, where X is the amount of
damage prevented during that turn.
Sacrifice Markov Household, create X 1/1 black Vampire creature tokens with lifelink and you
gain X life, where X is equal to the number of
Blood Counters on Markov Household.