Gilgamesh, The Last Monarch

During each upkeep Gilgamesh is in the command zone, put an experience counter on it. Experience counters are not removed if this card leaves the command zone, or if it enters the command zone from the battlefield.
Other creatures get +1/+1 for each experience counter on Gilgamesh.
"Do not mistake my youth for naivety. To do so is to welcome your destruction."