this.color.setGreen(true);
this.power = new MageInt(1);
this.toughness = new MageInt(1);
// Sliver creatures you control have "{T}: Add one mana of any color to your mana pool."
Ability ability = new AnyColorManaAbility();
this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD,
new GainAbilityAllEffect(ability,
Duration.WhileOnBattlefield, new FilterControlledCreaturePermanent("Sliver","Sliver creatures"),
"Sliver creatures you control have \"{T}: Add one mana of any color to your mana pool.\"")));
}