Shadow Fissure

Put a -1/-1 counter on target creature, proliferate.
If that creature would be sent to a graveyard,
put all counters on it and put them onto another
target creature, proliferate. Repeat this process
until a target creature doesn't leave the
battlefield.
Gain X life, where X is the number of creatures
sent to a graveyard by Shadow Fissure.
''Your curiosity will be the death of you... ''