Kiss of Serenity

Enchant Player
At the beginning of enchanted player's upkeep, that player loses 4 life unless he or she puts two -1/-1 counters on a creature he or she controls
or gets two poison counters.
"I would rather touch you, but if you desire it I will kill all of life, and for your sake become a poisonous flower that blooms at night."
- Hassan of Serenity