// Other Snake creatures you control get +0/+1.
this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, new BoostControlledEffect(0, 1, Duration.WhileOnBattlefield, snakeFilter, true)));
// Shamans you control have "{T}: Add {G}{G} to your mana pool."
this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, new GainAbilityControlledEffect(
new SimpleManaAbility(Zone.BATTLEFIELD, new BasicManaEffect(Mana.GreenMana(2)), new TapSourceCost()), Duration.WhileOnBattlefield, shamanFilter, false)));
}