ability.addTarget(target);
this.addAbility(ability);
/* {4}, {T}: Proliferate. (You choose any number of permanents and/or players
* with counters on them, then give each another counter of a kind already there.) */
ability = new SimpleActivatedAbility(Zone.BATTLEFIELD, new ProliferateEffect(), new GenericManaCost(4));
ability.addCost(new TapSourceCost());
this.addAbility(ability);
}