Simic Vermin

{t}: put a +1/+1 counter on target creature you control
{2}{t}: Double the number of +1/+1 counters on target creature you control
Remove three +1/+1 counters from target creature you control: Untap Simic Vermin, only activate this ability at most once each turn
{g}{g}{g}: Creatures you control have "{g}{t}, Put a +1/+1 counter on target creature you control" until end of turn