this.subtype.add("Mercenary");
this.color.setBlack(true);
this.power = new MageInt(5);
this.toughness = new MageInt(5);
this.addAbility(new SwampwalkAbility());
// {5}, {T}: Search your library for a Mercenary permanent card with converted mana cost 5 or less and put it onto the battlefield. Then shuffle your library.
Ability ability = new SimpleActivatedAbility(Zone.BATTLEFIELD, new SearchLibraryPutInPlayEffect(new TargetCardInLibrary(filter)), new TapSourceCost());
ability.addManaCost(new GenericManaCost(5));
this.addAbility(ability);
}