Tianhua-Xu, Outcast Cleric

Deathtouch, Lifelink
Other creatures you control have Symptom (Whenever a creature with Symptom deals
combat damage to another creature, put a
Symptom counter on the other creature. At the beginning of each upkeep of the creatures controller, as long as the Symptom counter is
on it, put a -1/-1 counter on it.)