Marine, Captain of Depravity

Ward {4}
Cumulative upkeep—Tap an untapped
permanent you control.(At the beginning of your
upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
At the end of your turn, target opponent gains
control of Marine and you lose 1 life for each age counter on it.
When Marine leaves the battlefield you lose 7
life.