Golden Company Mercenaries

Golden Company Mercenaries enters the battlefield with a +1/+1 counter on it.
Cumulative upkeep {1} (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 beginning of your upkeep, put a a +1/+1 counter on Golden Company Mercenaries.