The adjustment to deathmark was actually a suggestion in a thread I started (thanks for listening @Sirrian) as I felt that a troop having 2 turns where it can naturally cleanse before even having a chance to die was underwhelming and I have indeed seen deathmark (as well as poison, burn, and frozen) clense on the 1st turn (in the case of burn and poison do damage was delt and no life was lost respectively)
My suggestion in the thread that if an immediate effect could be taken by deathmark that perhaps there should be a cumulative 5% chance to die (as a cumulative 10% chance to heal would make the chance of death always be 1/2 the chance to heal)
My other suggestion was to keep the 10% thing even but not allow a troop to naturally heal for the same 2 turns so that it wouldn’t clense before it even gets a chance to do its thing
You can find my original post below