Zephyr of Sloth

Zephyr of Sloth enters the battle field with {x} +1/+1 counters.
Zephyr of Sloth can not attack or block.
On your end step put a -1/-1 counter on every untapped creature.
{g}: Remove a +1/+1 counter from target creature
and put a +1/+1 on a different target creature
{b}: Remove a -1/-1 counter from target creature
and put a -1/-1 on a different target creature
{1}{u}: Proliferate