Markov Purifier
Creature — Vampire Cleric
Lifelink
At the beginning of your end step, if you gained life this turn, you may pay 
. If you do, draw a card.
The ceremonial "incense" was a concoction of Edgar's own design, a precise blend of blood from his favorite human lineages.
G-host Lee
Innistrad: Crimson Vow (VOW)
• #241Rulings
Markov Purifier's ability triggers if you gained any amount of life that turn, even if you also lost that much or more life.
(wotc • 2021-11-19)
Rulings
Markov Purifier's ability triggers if you gained any amount of life that turn, even if you also lost that much or more life.
(wotc • 2021-11-19)