this.color.setGreen(true);
this.power = new MageInt(2);
this.toughness = new MageInt(2);
// Whenever a Sliver becomes blocked, that Sliver gets +1/+1 until end of turn for each creature blocking it.
Ability ability = new BecomesBlockedByCreatureTriggeredAbility(new BoostSourceEffect(1, 1, Duration.EndOfTurn), false);
this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD,
new GainAbilityAllEffect(ability,
Duration.WhileOnBattlefield, filter,
"Whenever a Sliver becomes blocked, that Sliver gets +1/+1 until end of turn for each creature blocking it.")));
}