Earthbending Form

Bending Form (At the beginning of your upkeep,
return this card you control to your hand. If you
control no Bender cards that are the same color as this
card, you cannot activate this card's other abilities.)
Put a -1/-1 counter on target creature. Activate
during your turn only and only once each turn.
{g}: Target creature that has a -1/-1 counter on it
gets -2/-2 until end of turn. Activate only once
each turn.