Aging Veteran

At the beginning of your upkeep, choose one that hasn't been chosen-
*Put 2 +1/+1 counters on Aging Veteran.
*Put a +1/+1 counter on Aging Veteran. It gains double strike.
*Aging Veteran deals damage equal to its power to target creature an opponent controls.
*Sacrifice Aging Veteran.
"There are just a couple more days until my retirement..."