The Olden One

The Olden One can be your commander.
{3}, Sacrifice a creature: Exile target creature,
then choose a kind of counter from among flying,
first strike, deathtouch, lifelink, menace, trample,
vigilance, or +1/+1. At the beginning of the next
end step, return that creature to the battlefield
under its owner's control with an additional
counter of that type on it.